Follow the path of questions to identify your shark. Use the diagram to the right as a reference for shark anatomy.
Once you have identified your species, click on the species name to learn more!
Shark taxonomy is constantly evolving, so please update us with any changes!
Anal Fin Present?
Flat body?
Squantiniformes - Angel Sharks
1a.
Anterior nasal barbels bifurcated or strongly fringed; posterior margin of anterior nasal flaps between nasal barbels and tip moderately to strongly fringed
2a.
Upper surface of body with large brown ocelli in addition to small light spots
3a.
Nasal barbels and anterior nasal flaps strongly fringed. A few large spines on snout and above eyes. Pectoral fins more rounded
3b.
Nasal barbels weakly fringed, anterior nasal flaps moderately fringed. Numerous small spines present on snout and above eyes. Pectoral fins more angular
2b.
Upper surface of body without large brown ocelli, but usually with white spots
4a.
Large spines present on midline of back and tail from head to dorsal fins and between the fin bases. Dermal folds on sides of head with prominent triangular lobes.
Fringes on anterior nasal flaps very strong and deep
4b.
Spines on midline of back small or absent. Dermal folds on sides of head without triangular lobes. Fringes on anterior nasal flaps moderately deep
5a.
Anterior nasal barbel weakly bifurcate. First dorsal fin usually well behind free rear tips of pelvic fins. Dermal denticles of back with three ridges
5b.
Anterior nasal barbel strongly fringed. First dorsal fin with origins about opposite free rear tips of pelvic fins. Dermal denticles of back without ridges
B.
Found in South Africa. Visually similar to Chlamydoselachus anguineus. Elongated and eel-like body; mouth nearly terminal on head; 3- cusped teeth in upper and lower jaws
C.
Stouter body and less eel-like; mouth subterminal on head; high, longcusped teeth in upper law, larger, comblike teeth in lower jaw
Fin spine present?
Hexanchidae - Cow Sharks
1.
Six pairs of gill openings
A.
Short, blunt, and broad snout; Dorsal fin base separated from upper caudal fin origin by a distance about equal to or slightly greater than its length. Very large, up to 4.7 m total length
B.
Longer, pointed, and narrow snout; dorsal fin base separated from upper caudal fin origin by a distance much greater than its length. Smaller, up to 1.8 m total length
2a.
Very large eyes, head extremely narrow and pointed; comblike lower teeth long and low, with a short cusplet Plain body color without spots; Smaller size, about 1.4 m in length
2b.
Small eyes, head broad and rounded; comblike lower teeth high and short, with a set of serrations. Body usually has scattered small black spots and sometimes white spots. Larger size, about 2.9 m in length
2a.
Brownish grey body characterized by bilateral symmetry with a flattened head and body with a long and thin saw-like rostrum. Preoral snout about a third of body length. A pair of barbels are located halfway down the rostrum
2b.
Rostrum relatively short and broad, distance from rostrum tip to barbels much greater than distance from barbels to mouth; dorsal and pectoral fins partially naked in large specimens
2c.
Rostrum long and narrower, distance from rostrum tip to barbels about equal or slightly greater than distance from barbels to mouth. Dorsal and pectoral fins covered with denticles in large specimens
2.
First dorsal fin spine inclined forward. Colour either light grey-brown or variegated, with dark and light bands
2a.
Spiracle large and vertically elongated, supraorbital ridges greatly expanded posteriorly, forming a rounded knob just in front of spiracle on each side covered with enlarged denticles
B.
Cusplets present and prominent on most teeth. Fin spines, especially that of second dorsal fin, relatively long
C.
Anterior nasal flaps with elongated barbels, reaching mouth
D
Anterior nasal flaps without elongated barbels, not reaching mouth
E.
Upper teeth with cusplets in addition to a cusp
F.
Preoral snout length greater than distance from mouth to pectoral origins. Dermal denticles of back with tall, slender pedicels and pitchfork-shaped crowns
G.
Upper teeth relatively broad, bladelike,lowers low and wide. Rear tips of pectoral fins short and angular to elongated and acutely pointed
H.
Lower teeth with relatively low, more or less oblique cusps
I.
Lower teeth with relatively high, more less erect cusps
Gill openings uniform width and second dorsal fin origin over or in front of of pelvic fin origin?
Gill openings increasing in width posteriorly with a very wide fifth gill opening. Pectoral fin inner margin and free rear tip greatly expanded and lobate. Second dorsal fin origin anterior to pelvic origins
First dorsal fin origin well ahead of pelvic fin origins?
Second dorsal base at least twice as long as first dorsal base. Upper caudal lobe shortened, caudal fin paddle-shaped?
A.
First dorsal fin with a spine (sometimes concealed by skin); fin closer to pectoral bases than to pelvic bases. Second dorsal base about twice as long as first dorsal base. Snout more elongated and pointed, snout length about half length of head
C.
First dorsal fin spineless; fin closer to pelvic bases than to pectoral bases. Second dorsal base about four times as long as first dorsal base. Snout shorterand more bluntly rounded, snout length about 2/5 of head length
A.
Preoral snout very short, less than 1/3 of head length. Lips thick and pleated Lower teeth with strongly serrated edges. Caudal fin with weak ventral lobe
B.
Preoral snout longer, more than 1/3 of head length. Lips thin and not pleated. Lower teeth either with smooth or weakly serrated (some Somniosus sp.) edges. Caudal fin with a strong ventral lobe
A.
Preoral snout as long as distance from mouth to 5th gill openings or longer. First dorsal insertion over pectoral bases
1b.
Colour blackish or blackish-brown above and below, without black markings on underside of body or sides of tail
2a.
Rear tips of pectoral fins ending well anterior to origin of first dorsal spine. Distance between pectoral and pelvic bases much greater than head length
3a.
Caudal peduncle elongated, distance from second dorsal insertion to upper caudal origin somewhat longer than distance from eye to pectoral origins. A dwarf species - adult less than 30 cm long
3b.
Caudal peduncle rather short, distance from second dorsal origin to upper caudal origin as long as distance from eye to third gill slits or less. Larger size - adult at over 40 cm long
4a.
Mouth long and more narrowly arched. Denticles close-set on body. A large species - adult at over 50 cm long
2b.
Rear tips of pectoral fins ending about opposite origin of first dorsal spine or slightly in front of it. Distance between pectoral and pelvic bases about equal to head length or less
5a.
Fins with white tips. Mouth fairly short, less than a third as high as wide
1a.
Second dorsal fin almost as large as first. Anterior nasal flaps with very large, broad secondary lobe. Upper precaudal pit weak or absent. Postventral caudal margin shallowly concave.
Denticles very large, body surface rough
(previously known as Squalus asper)
1b.
Short snout, tremendously elongated anterior nasal flaps, no anal fin, stout fin spines on both dorsals, low, bladelike cutting teeth in both jaws, very stout body
1.
Second dorsal fin much smaller than first. Anterior nasal flaps with secondary lobe small and narrow to absent. Upper precaudal pit strong. Postventral caudal margin deeply notched. Denticles small, body surface smooth
2a.
Preoral snout elongated, about 1.5 to 2.0 times mouth width, preorbital snout two times eye length or more in adults. Eyes closer to first gill slits than snout tip. Inner corners of nostrils closer to mouth than snout tip
3a.
Tips of dorsal fins, dorsal caudal margin and ventral caudal lobe conspicuously black
2b.
Preoral snout short to moderately elongated, usually less than 1.4 times mouth width, preorbital snout less than two times eye length in adults. Eyes closer to snout tip than first gill slits. Inner corners of nostrils closer
to snout tip than mouth
5a.
Origin of first dorsal spine well behind free rear tips of pectorals. Secondary lobe minute or absent on anterior nasal flaps. Usually white spots present on sides
5b.
Origin of first dorsal spine over inner margins of pectorals and usually in front of their rear tips. Secondary lobe well-developed on anterior nasal flaps. No white spots on sides
6a.
Diagonal distance from centre of snout tip to inner edge of nostril less than or about equal to distance from nostril to upper labial furrow. Pectoral fins with acutely pointed free rear tips.
Lateral trunk denticles lanceolate
7a.
Fin spines rather long, first dorsal spine nearly equal to fin base. Posterior margin of pectoral fins deeply concave. Midpoint of pelvic bases. about midway between first and second dorsal bases
7b.
Fin spines rather short, first dorsal spine much less than fin base. Posterior margin of pectoral fins moderately concave. Midpoint of pelvic bases closer to first dorsal base than second
6b.
Diagonal distance from centre of snout tip to inner edge of nostril greater than distance from nostril to upper labial furrow. Pectoral fins with rounded rear tips. Lateral trunk denticles tricuspidate
8a.
First dorsal height more than 3/4 of its length from origin to free rear tip, first dorsal spine as long as fin base. Height of second dorsal more than 5% of total length, second dorsal spine usually
over 6% of total length
8b.
First dorsal height less than 2/3 of its length, first dorsal spine much shorter than fin base. Height of second dorsal less than 5% of total length, second dorsal spine less than 6% of total length
7b.
Black flank marking with a long anterior branching in front of pelvic fins
8a.
Body very slim. Tail very long, distance from pelvic insertions to lower caudal origin equal to head. Posterior branch of flank marking very narrow and greatly expanded, longer than anterior branch
8b.
Body rather stout. Tail short, distance from pelvic insertions to lower caudal origin much less than head. Posterior branch of flank marking rather broad and short, shorter than anterior branch
12b.
Lateral trunk denticles with long, slender cusps. Underside of snout scaled
13a.
Black markings on sides of tail and underside of head distinct. Prespiracular head about as long as distance from spiracles to pectoral insertions. Interdorsal space about as long as snout tip to pectoral insertions
13b.
Dark markings on body indistinct. Prespiracular head about as long as distance from spiracles to pectoral origins. Interdorsal space much less than snout tip to pectoral origins
10b.
Distance from pelvic insertions to lower caudal origin only about half as long as distance between pectoral and pelvic bases
14a.
Interdorsal space longer than distance from snout tip to pectoral insertions. Distance from second dorsal insertion to upper caudal origin about a third as long as interdorsal space
1b.
No subcaudal keel on the lower caudal peduncle
2a.
First dorsal fin rather high, angular, and short, distance from its spine origin to free rear tip about 2/3 of distance from free rear tip to origin of second dorsal spine
2b.
First dorsal fin rather low, rounded, and long, distance from its spine origin to its free rear tip greater than distance from free rear tip to origin of second dorsal spine
3a.
Lateral trunk denticles moderately large, crown length about 0.5 mm. Colour usually grey-brown
1a.
Lateral trunk denticles with leaflike flattened crowns on elevated narrow to broad pedicels extending above the denticle bases, and with medial and lateral cusps on their posterior ends
2a.
Free rear tips of pectoral fins broadly angular and not reaching past first dorsal spine origin. Denticles of adults with multiple lateral cusps
1b.
Lateral trunk denticles with flat sessile atop the denticle bases, without separate pedicels and with or without a posterior medial.
3a.
Second dorsal fin very small, half height of first dorsal or less, with spine origin usually well posterior to rear tips. Inner margins of pectoral fin longer than distance from second dorsal spine origin to upper caudal origin
3b.
Second dorsal fin larger, 3/4 of first dorsal height or more, with spine origin usually over pelvic inner margins. Inner margins of pectoral about as long or shorter than distance from second dorsal spine origin to upper caudal origin
4a.
Denticles of adults without cusps, crowns broadly rounded posteriorly
5a.
Distance from first dorsal insertion to origin of second dorsal spine about as long as tip of snout to pectoral insertions
4b.
Denticles of adults with medial cusps, crowns angular and thornlike posteriorly
6a.
Snout rather short and broad, preoral length less than mouth width. Free rear tips of pectoral fins slightly elongated, not extending behind first dorsal spines. Lateral trunk denticles of adults narrow and teardropshaped. Postventral
margin of caudal fin virtually straight in adults. A large species reaching over 1.5 m
(previously known as Centrophorus niaukang)
6b.
Snout rather long and narrow, preoral length greater than mouth width. Free rear tips of pectoral fins greatly elongated, extending well behind first dorsal spine. Lateral trunk denticles of adults broad and rhomboidal. Postventral margin
of caudal fin notched in adults. Maximum size usually below 1 m
1a.
Snout greatly elongated, preoral length about equal to distance from mouth to pectoral fin origins. Upper labial furrows greatly elongated, their lengths greater than distance between their anterior ends
1b.
Snout shorter, preoral length much less than distance from mouth to pectoral fin origins. Upper labial furrows shorter, their lengths less than distance between their anterior ends
2a.
Snout moderately long, preoral length about as long as distance from mouth to first gill slits, and about equal to mouth width
3a
Dorsal fin spines rather stout and prominent, exposed anterior margin of first spine nearly half length of fin base from insertion to rear end of spine. Body strongly tapering rearwards from pectoral fins. Pectoral fins large, their
apices nearly or quite reaching first dorsal spine when laid back
3b.
Dorsal fin spines inconspicuous, with only tips slightly protruding or not at all. Body not tapering from pectoral fins, dorsoventral contours nearly parallel to pelvic bases. Pectoral fins smaller, their apices falling well ahead of first dorsal spine when laid back
4a
Dorsal fin spines usually concealed by skin. Base of first dorsal fin extending anteriorly as a conspicuous broad ridge to over the pectoral bases
(previously known as Centroscymnus cryptacanthus)
now known as
Centroscymnus owstoni
4b.
Dorsal fin spines with tips usually exposed. Base of first dorsal fin little exended anteriorly as a low ridge to behind pectoral rear tips
2b.
Snout short, preoral length about 2/3 as long as distance from mouth to first gill slits, and less than mouth width
5a.
Lateral trunk denticles very large, with smooth, rounded crowns in adults, resembling bony fish scales. Body not tapering from pectoral fins, dorsoventral contours nearly parallel to pelvic bases.. First dorsal base not expanded forwards,
origin of fin well behind pectoral rear tips
5b.
Lateral trunk denticles small and with tricuspidate ridged crowns in adults, not resembling bony fish scales. Body tapering posteriorly from pectoral fins. First dorsal base expanded forward, origin of fin about opposite pectoral rear tips
1a.
Lower teeth with low roots and high, slender, semierect cusps. Number of tooth rows 57 to 63/33 to 36. A short lateral keel present on caudal fin base. Small sharks - adults less than 1.5 m
1b.
Lower teeth with high roots and low, broad, oblique cusps. Number of tooth rows 35 to 52/48 to 58. No lateral keel on caudal fin base. Gigantic sharks - adults to 4 or more metres
2a.
Interdorsal space at least as long as prebranchial length
6b.
Body with 7 to 12 vertical dark bands, not arranged in a harness pattern
7a.
Ground colour white or cream with narrow, discrete brown or black vertical bands; distance from anal base to lower caudal origin over twice anal base
7b.
Ground colour tan to brown with broad, diffuse-edged brown vertical bands; distance from anal base to lower caudal origin less than twice anal base.
A.
Head and body greatly flattened, head with skin flaps on sides
B.
Head and body cylindrical or somewhat flattened, head without skin flaps
A.
No lobe and groove around outer edges of nostrils
B.
A lobe and groove around outer edges of nostrils
A.
Spiracles minute. Origin of anal fin well in front of second dorsal origin, separated from lower caudal origin by space equal or greater than its base length
B.
Spiracles large. Origin of anal fin well behind second dorsal origin, separated from lower caudal origin by space less than its base length
A.
Nasal barbels very long. Anal fin high and angular. Distance from vent to lower caudal origin shorter than distance from snout to vent
B.
Nasal barbels short. Anal fin low, rounded and keel-like. Distance from vent to lower caudal origin longer than distance from snout to vent
Orectolobidae - wobbegongs
1a.
Chin with dermal lobes. Body with a reticular pattern of narrow dark lines
1b.
Chin without dermal lobes. Colour pattern variable, but without a reticular pattern of narrow dark lines
2a.
Head and body without tubercles or with small ones or inconspicuous dermal ridges. Dorsal fins higher, height at least three-fourths of base length. Origin of first dorsal behind midbase of pelvis
2b.
Head and body without tubercles or with small ones or inconspicuous dermal ridges. Dorsal fins higher, height at least three-fourths of base length. Origin of first dorsal behind midbase of pelvis
1a.
Teeth not compressed in sides of jaw, not imbricated; Pectoral, dorsal and anal fins apicaily rounded, pectoral fins broad and not hooked
1b.
Teeth more or less compressed in sides of jaws, forming imbricated series. Pectoral, dorsal and anal fins apically angular, pectoral fins-narrow and hooked
1b.
First dorsal fin closer to snout tip than subterminal notch. Nine or ten dark saddles on back and tail
2a.
First dorsal origin well behind pelvic free rear tips. Anal insertion below second dorsal origin, free rear tip reaches first fourth of second dorsal base, anal base shorter than distance from anal insertion to lower caudal origin
2b.
First dorsal origin over pelvic free rear tips. Anal insertion below midbase of second dorsal, free rear tip reaches second dorsal insertion, base about equal to distance from anal insertion to lower caudal origin
1a.
Gill region with a prominent dark collar marking dotted with dense white spots, body with brown blotches and small white spots, fins with very prominent large black blotches
1b.
Gill region with an indistinct to prominent dusky collar marking with or without a few brown spots but lacking white spots, body with small to moderately large brown spots but no blotches, fins with small brown spots but no black blotches
2a.
Gill region with a prominent dusky collar, dark spots absent from pectoral fin
1a.
Body and tail very slender. Anal fin origin far behind free rear tip of second dorsal, length of anal fin from origin to free rear tip subequal to length of hypural caudal lobe from lower caudal origin to subterminal notch. Colour pattern
with numerous small dark spots and bars
1b.
Body and tail moderately slender to relatively stout. Anal fin origin below or close behind free rear tip of second dorsal, length of anal fin considerably shorter than hypural caudal lobe. Colour pattern varied but without numerous small dark spots and bars
2a.
Ground colour of body dark with numerous light spots
3a.
Dorsal fins large and angular, snout tip truncated. Colour pattern without transverse dark bands, blue spots
5a.
No lateral ridges on trunk. First dorsal origin over anterior halves of pelvic fin bases. A colour pattern of saddles and a few scattered dark spots in young
2b.
Black spot behind gills large, in the form of a conspicuous ocellus, ringed with white
3a.
Body covered with numerous, densely clustered dark small and large spots that form a reticular network of light ground colour between them. Dark crossbands strong on ventral surface of tail
3b.
Body with sparse, large dark spots that do not form a reticular network of light ground colour between them. Dark crossbands not reaching ventral surface of tail
4a.
Lateral ocellus not surrounded by large black spots. Spots present on head in front and below eyes
1a.
Nasal barbels not branched. Dermal lobes of head very broad-based, only 2 or 3 in front of eyes. Colour pattern simple, dark rounded saddles with tight outlining widely spaced by dusky areas
and with a few dark spots; saddles on head and trunk forming conspicuous eyespots
1b.
Nasal barbels branched. Dermal flaps narrow-based and more numerous, 5 or more in front of eyes. Colour pattern with elaborate variegated spots and saddles
2a.
Back dark, with light O-shaped markings obscuring darker saddles. About 8 to 10 dermal flaps below and in front of eyes
A.
Lateral blades of head anteroposteriorly broad, not winglike. Nostrils short, their widths 7 to 14 times in internarial width and less than half of mouth width. No knobs along anterior margin of head
B.
Lateral blades of head very narrow and winglike. Nostrils greatly enlarged, their widths 0.8 to 0.9 times in the internarial width and nearly twice the mouth width. Knobs present along anterior margin of head, opposite nostrils
1a.
Head shovel-shaped and narrow, its width 21% of total length or less (usually less). Anterior margin of head not notched. Posterior teeth expanded as broad, molariform crushers
1b.
Head broader and more hammer- or axe-shaped, its width over 22% of total length. Anterior margin of head more or less notched, just medial to nostrils. Posterior teeth not expanded as molariform crushers
2a.
Posterior margins of lateral blades of head usually more or less transverse. Free rear tip of first dorsal over or behind pelvic origins. Posterior margin of anal fin straight or concave, not deeply notched. Size smaller, adults less than 2 m
3a.
Prenarial grooves present on anterior edge of head medial to nostrils. Head with a well-defined medial indentation and paired lateral indentations on its anterior edge. First dorsal fin more erect
3b.
Prenarial grooves hardly developed on anterior edge of head. Head with poorly defined medial and lateral indentations. First dorsal fin more falcate
4a.
Snout longer, preoral length usually over 2/5 of head width. Mouth narrowly arched. Anal fin shallowly concave
2b.
Posterior margins. of lateral blades of head usually arching posterolaterally (except in adults of S. mokarran). Free rear tip of first dorsal well in front of pelvic origins. Posterior margin of anal fin usually deeply notched. Size larger, adults at least 3 m
5a.
Anterior margin of head nearly straight in adults. Prenarial grooves absent or hardly developed. Teeth strongly serrated at all sizes. Pelvic fins high and falcate. First dorsal markedly falcate. Second dorsal fin high, with a short inner margin and deeply concave
posterior margin
5b.
Anterior margin of head moderately convex in adults, strongly so in young. Prenarial grooves well-developed. Teeth smooth-edged in young, weakly serrate in adults. Pelvic fins low and not falcate, with nearly straight posterior edges. First dorsal usually
semifalcate. Second dorsal fin low, with a long inner margin and nearly straight posterior margin
6a.
No median indentation on anterior margin of head. Free rear tip of second dorsal well ahead of upper caudal origin. Anal base about as large as second dorsal base
6b.
A prominent median indentation on anterior margin of head. Free rear tip of second dorsal nearly reaching upper caudal origin. Anal base noticeably larger than that of second dorsal
7a.
Lateral lobes of head narrower transversely and longer from front to back in adults. First dorsal origin over pectoral midbases. Pectoral fins plain, not dark-tipped
7b.
Lateral lobes of head broader transversely and shorter from front to back in adults. First dorsal origin slightly behind pectoral insertions. Pectoral fins dark-tipped
1a.
Head nearly flat between eyes; with a deep horizontal groove on nape on each side above gills. Eyes very large, with orbits expanded onto dorsal surface of head. Teeth larger, less than 25 rows in each jaw. First dorsal fin base closer to
pelvic bases than pectoral bases
1b.
Head strongly arched between eyes; with no horizontal groove or with an inconspicuous one on nape on each side. Eyes smaller, with orbits not expanded onto dorsal surface of head. Teeth smaller, 29 or (usually) more rows in each jaw. First
dorsal fin base about equidistant between pectoral and pelvic fin bases or closer to pectoral bases
2a.
Head narrow, snout more elongated, forehead nearly straight. Labial furrows absent. Lateral teeth with well-developed distal cusplets. Pectoral fins nearly straight and broad-tipped. Terminal lobe of caudal shorter, its length from subterminal notch
to caudal tip about equal to second dorsal base. Sides above pectoral bases dark, without an extension of the white abdominal area
2b.
Head broad, snout shorter, forehead strongly arched. Labial furrows present. Lateral teeth usually without distal cusplets. Pectoral fins falcate and narrow tipped. Terminal lobe of caudal longer, its length from subterminal notch to caudal tip over
twice second dorsal base. Sides above pectoral bases marked with a white patch extending forward from the abdominal area
Distinct pattern of coloration, spots contrasting body color?
First dorsal fin base directly above or behind pelvic fin base?
Head broadly flattened and spatulate?
A.
Tip of snout upturned, colour pattern of about 26 narrow dark bars, the darkest in pairs with a light bar in between and numerous small brown spots and vermiculate marks between the bars. Head rather narrow, mouth small and short
B.
Tip of snout upturned, colour pattern of about 10 darker saddles consisting of dark bars surrounding a light centre, and with spots few or absent between the saddles. Head rather broad, mouth large and broad
C.
Snout pointed but not upturned, colour pattern of numerous vertical dark bars with few spots, spots that are present are arranged in rows between bars
D.
Snout pointed but not upturned, dark spots few and sometimes in clusters around vague saddle blotches. Labial furrows reduced or absent, lower furrows 2mm long or less
F.
Light brown colour with obscure dusky saddles and scattered large dark rusty spots on back and fins. If present, claspers are short, fairly thick, and pointed
G.
Mottled chocolate brown colour on top of shark with a white underside; numerous small white spots on back and fins. If present, claspers are long, very slender, and blunt
D.
Anterior nasal flaps broadly triangular, overlapping mouth. No dark or light spots. A dwarf species, adults less than 40 cm. If present, claspers narrow and greatly elongated.
E.
Colour pattern of obscure dusky saddles on back, sometimes obsolete in adults, fins not conspicuously light-edged. Anterior nasal flaps do not overlap mouth. Large species, adults to one metre or more. If present, claspers are broad and not greatly elongated.
F.
Colour pattern of prominent dusky saddles on back and broad dark lines on head, fins dusky with conspicuous light edges. Large species, adults to one metre or more. If present, claspers are broad and not greatly elongated.
Cephaloscyllium nascione - See C. laticeps
A.
Anterior nasal flaps have prominent barbels. Short upper labial furrows present in addition to lower labial furrows
B.
Anterior nasal flaps without barbels (in some cases medial projections are present at) Lower labial furrows present, upper labial furrows absent
C.
A large species, exceeding 1 m. Saddles well developed in adults. Colour pattern includes numerous small light spots uniformly distributed on sides and back. Anterior nasal flaps not greatly expanded. No nasoral grooves.
D.
Small and large dark spots, sometimes white spots densely distributed over head, fins, or saddle marks, Saddle marks inconspicuous or masked by spots. Anterior nasal flaps not greatly expanded. No nasoral grooves.
G.
Saddle marks clearly visible. Numerous white spots present but confined to saddle marks. Anterior nasal flaps not greatly expanded. No nasoral grooves.
H.
Saddle marks clearly visible, outlined by borders of black spots or broken black lines. Usually no white spots, but very few if present. Anterior nasal flaps not greatly expanded. No nasoral grooves.
I.
Dark base colour, few spots. Head broad, its width nearly equal to head length. Skin not very rough. Anterior nasal flaps not greatly expanded. No nasoral grooves.
K.
Narrow head, lighter base colour with slightly darker saddles and numerous black spots, anal base as long as or longer than interdorsal space. Anterior nasal flaps not greatly expanded. No nasoral grooves.
L.
Narrow head, lighter base colour with slightly darker saddles and numerous black spots, anal base shorter than interdorsal space. Anterior nasal flaps not greatly expanded. No nasoral grooves.
B.
Head very broad, Usually larger and somewhat irregular dark spots spaced closely together on a light bodu colour, light areas having a reticulated appearance
C.
First dorsal origin over or behind pelvic insertions. Dorsal saddle markings with conspicuous darker margins; saddles dotted with numerous small white spots
D.
First dorsal origin somewhat ahead of pelvic insertions. Dorsal saddle markings without conspicuous darker margins; saddles dotted with sparse large white spots
E.
Colour pattern of grey saddles separated by light areas and outlined by numerous small black spots (hatchlings have a simpler pattern of dusky saddles
G.
Anterior nasal flaps broad and triangular. Clearly defined dark saddles and numerous dark spots, white spots few or absent. Adults at least 63 cm in length
H.
Anterior nasal flaps broad and triangular. Saddles only slightly darker than background or absent, white spots numerous. Adults only up to 35 cm in length
M.
Anal base shorter than space between pelvic and anal bases. Mouth lining white, indistinct saddle markings present or absent from body. Base of precaudal tail fairly low and cylindrical.
N.
Anal base longer than space between pelvic and anal bases. Mouth lining white, indistinct saddle markings present. Base of precaudal tail fairly low and cylindrical.
O.
15 to 18 dorsal saddle blotches on back. Free rear tip of anal fin reaches or extends past lower caudal origin. A large species, adults over 50 cm. Mouth lining usually black. Base of precaudal tail fairly high and compressed
P.
Snout more elongated, mouth longer and more narrowly arched with lining usually black. Saddle blotches grey or blackish grey and less than 11 are usually present. Free rear tip of anal fin falling in front of lower caudal origin. Adults less than 45 cm
Q.
Underside of caudal fin arched slightly. Pectoral fin base close to length of pelvic fin base. Snout shorter, and more broadly arched. Brown saddle blotches, if present.
Anterior nasal flaps formed inro slender barbels. Almost humpbacked, grey colour above and light colour below, dark saddles in young and some adults. Snout short and broadly rounded, eyes elongated, labial furrows moderately long.
A.
Anterior nasal flaps large, with posterior ends nearly reaching upper symphysis. Body very slender. First dorsal origin behind pectorals. Dark brown spots and indistinct saddles
B.
Anterior nasal flaps smaller, with posterior ends falling well in front of mouth. Body rather stout. First dorsal origin in front of pectoral rear tips. Combination of large red undulating blotches, spots, and lines
A.
Small white spots present on body, vertical dark bands present only in young, preorbital snout short and blunt, narrow mouth.Found in the eastern South Pacific
C.
Grey to brown colour with numerous white spots, snout bluntly rounded, dorsal fins similar in shape. Adults range from 78 to 140 cm in length. Found in eastern North Atlantic and Mediterranean.
D.
White spots on upper body, relatively small pectoral and pelvic fins. Adults range from 55 to 90 cm. Found in the Indian Ocean and western North Pacific.
E.
Usually a few small dark spots or blotches on dorsal surface of body. Grey to brown above, white below, trailing edges of dorsal fins dark. Aduts range from 50 to 60 cm. Found in the eastern North Atlantic and Mediterranean.
First dorsal fin almost as large as second dorsal fin -at least two-thirds of the size?
1.
Origin of first dorsal somewhat in front of pelvic insertions.
1a.
Small nostrils and very long mouth very long that is expanded in front of eyes. Enlarged gill slits with some nearly equal to length of eyes in adults
1b.
Angular prenarial snout angular. Large distance between pectoral and pelvic fin bases. Rear tips of pectoral fins far in front of the pelvic fin origin
1c.
Broadly rounded prenarial snout. Very short distance between pectoral and pelvic fin bases. Rear tips of pectoral fins opposite or just in front of pelvic fin origins
2.
Origin of first dorsal behind pelvic insertions.
2a.
White or reddish white colour. Relatively narrow and pointed snout. Mouth extends well in front of eyes. Eyes are very small, about equal to the length of the longest gill slit
2b.
Short distance between pectoral and pelvic bases. Anal fin base 2.5 to 3.5 times fin height. Black, brown or grey colouring. Broad, rounded snout with the mouth positioned mostly under the eyes. Eyes are larger, their length much greater than widest gill slit.
2c.
Long distance between pectoral and pelvic bases longer. Anal fin base is short and 4 to 5 times the fin height. Black, brown or grey colouring. Broad, rounded snout with the mouth positioned mostly under the eyes. Eyes are larger, their length much greater than widest gill slit.
2d.
Longer anal base longer. Pelvic fins relatively high and broadly rounded. Black, brown or grey colouring. Broad, rounded snout with the mouth positioned mostly under the eyes. Eyes are larger, their length much greater than widest gill slit.
2e.
Low and angular pelvic fins. Black, brown or grey colouring. Broad, rounded snout with the mouth positioned mostly under the eyes. Eyes are larger, their length much greater than widest gill slit.
A.
Narrow nostrils and very wide gill slits. Fins have prominent white edges. Anal fin tall and broadly rounded - about twice as long as its height. Long distance between pectoral and pelvic fin bases.
B.
Low and subangular anal fin that is three times as long as its height. Short distance between pectroal and pelvic fin bases. Fins do not have white edges.
G.
Shorter snout. Interdorsal space equal to or slightly shorter than first dorsal fin base length. Very short inner margins of pectoral fins - about 1/3 of pectoral fin base length.
I.
Weak projections on gill septa. First dorsal origin over the last fourth of pelvic bases. Interdorsal space greater than first dorsal base. Longer inner margins of pectoral fins.
P.
Mouth very short and relatively small, not expanded in front of eyes and with dental bands not greatly enlarged. First dorsal about two-thirds of area of second, extending anteriorly as a long, low ridge to nearly over pelvic origins.
Q.
Body stout and strongly tapering to head. Lateral trunk denticles very sparse on body, not overlapping. Nostrils with circular, broad incurrent and excurrent apertures. Anal fin broadly rounded, caudal fin very narrow. Tips of dorsal fins a white colour
R.
Body slender and not strongly tapering to head. Lateral trunk denticles more close-set on body, nearly overlapping. Nostrils with elongate-oval, narrow incurrent and excurrent apertures. Anal fin subangular, caudal fin broader. Tips of dorsal fins plain
B.
Head greatly depressed and trowel-shaped. Pectoral fins broadly triangular, length from origins to free rear tips about equal to their anterior margins. Free rear tip of first dorsal about over midbases of pelvic fins. Postventral margin
of caudal fin usually only shallowly concave
E.
Known only from the Philippines. Soft body with a parabolic snout, dark tips of dorsal fins, second dorsal fin base longer than first dorsal fin base.
A.
Conical snout, first dorsal fin is large and triangular - originating over inner margins of pectoral fin. Teeth are serrated. Gill slits long, second dorsal and anal fins very small. Adult body size ranges from 4.5m to 6.0m
B.
Teeth are smooth edged, Smaller size, adults ranging from 1.7m to 3.0m
A.
Origin of second dorsal over origin of anal fin. Secondary keel present below main keel on caudal fin.
B.
Origin of first dorsal over or behind rear tips of pectorals, origin of second dorsal well in front of anal fin origin. No secondary keel on caudal fin.
A.
Snout relatively long, distance from snout tip to eye 2 or less times in distance from eye to first gill opening. Underside of body white, without dark spots and blotches, free rear tip of first dorsal abruptly white
B.
Snout shorter, distance from snout tip to eye 2.5 or more times in distance from eye to first gill opening. Underside of body white with.dark spots and blotches (except possibly in very small individuals), free rear tip of first dorsal not abruptly white
A.
Snout usually sharply pointed. Pectoral fins considerably shorter than head, relatively narrow-tipped in young and pointed in adults. Origin of anal fin about under midbase of second dorsal fin. Underside of snout and mouth white
B.
Snout narrowly to bluntly pointed. Pectoral fins about as long as head, relatively broad-tipped in young and adults. Origin of anal fin about under insertion of second dorsal fin. Underside of snout and mouth dusky
D.
Head and especially branchial region greatly enlarged, giving adults a tadpole-shape. Origin of first dorsal fin slightly anterior to pelvic origins
C.
Second dorsal fin larger than the first and about as large as the anal fin. Origin of first dorsal fin opposite of pelvic fin origins, Anterior nasal flaps reduced to low points.
D.
Large anterior nasal flaps, nasal flaps triangular. Second dorsal insertion well in front of anal insertion. Second dorsal about as large as first and much smaller than anal fin
E.
Nasal flaps narrowly lobate. Second dorsal insertion about opposite anal insertion. Second dorsal about as large as first and much smaller than anal fin
A.
First dorsal origin over or ahead of free rear tips of pectoral fins. Distance from pectoral free rear tips to pelvic fin origins greater than first dorsal length from origin to free rear tip
B.
First dorsal origin over pectoral inner margins, anterior to their free rear tips. Distance from pectoral free rear tips to pelvic origins about as long as first dorsal
B.
No eye notches. Labial furrows long, but reduced in a few species. First dorsal base usually less than 2 times in distance between pectoral and pelvic fin bases
A.
Slender, grey to grey-brown body with a white underside. Narrow snout and large eyes. The fins are slightly darker in color than the body. The mouth has unique, long labial folds at the corners. The second dorsal fin is small. The anal fin has a pair of long pre-anal ridges. There is no interdorsal ridge.
B.
First dorsal is located directly over or slightly in front of the pectoral rear tips. The second dorsal fin originates above the middle of the anal fin. Dorsal surface has white spots in adults. Second dorsal fin originates over or behind midpoint of anal fin
C.
Brown to grey body, slender with a long snout. Long labial furrows are present around the corners of the mouth. The first dorsal fin is typically over or just behind the free tips of the pectoral fins.
D.
Found throughout the Indo-West Pacific. Bronze to greyish body color with a white underside, pale margins on the pectoral fins. Upper lobe of caudal fin linked with black. Second dorsal fin slightly smaller than anal fin, and promiinent preanal ridges are present. Long, narrowly rounded snout. Very small labial furrows.
E.
Found only in northern Australia, southern West Papua and Papua New Guinea. Bronze to greyish body color with a white underside, dark margins on the pectoral fins. Upper lobe of caudal fin linked with black. Second dorsal fin slightly smaller than anal fin. Preanal ridges very long. Long, narrowly rounded snout with very short labial furrows.
G.
Smaller sharks, attaining 64 cm total length or less. Long upper and lower labial furrows, small second dorsal fin with origin far behind anal origin. Long anal ridges
A.
High proximal and distal cusplets present on most teeth in both jaws. Expanded anterior nasal and mesonarial flaps forming a tube for the excurrent aperture
B.
Upper anterolateral teeth with very short cusps. No cusplets on lower teeth, roots and crown feet deeply arched, giving teeth an inverted Y shape. Tooth row counts 25 to 34/37 to 43, 6 to 20 more lower
rows than uppers. Pelvic and dorsal fins, and ventral caudal lobe strongly falcate
C.
First dorsal fin is broadly rounded, pectoral fins are padddle shaped. A white molting coloration is present on the first dorsal, pectoral, and caudal fins.
D.
Dark grey to grey-brown coloration with a white underside. White margins on all fins. Interdorsal ridge present. Snout is broadly rounded, large eyes, and first dorsal is large
E.
Dark grey to bronze grey coloration with a white underside. First dorsal fin is irregularly edged with white, and cadual fin is entirely edged with black. Other fins may be tipped with black. No interdorsal ridge present. Snout is broadly rounded and eyes are large.
Prominent dusky bars present, stocky body shape, boxy head?
Upper labial furrows very long, extending to front of eyes. Spiracles present and relatively large. Prominent lateral keels on caudal peduncle. Vertical black or dusky bars on back, obscure or absent on adults
A.
First few anterior teeth in lower jaw with entire smooth cutting edges and low cusplets on the crown foot. Second dorsal fin lower, about half height of first dorsal
B.
First few anterior teeth in lower jaw with cutting edges confined to tips of cusps, giving cusps a spearlike shape, and no cusplets. Second dorsal higher, about 3/5 height of first dorsal
2b.
Teeth prominently protrude from mouth. Slender, light grey body with very long gill slits. Ends of upper labial furrows behind rear corners of eyes
A.
Snout obtusely wedge-shaped in dorsoventral view. Lower jaw rounded at symphysis. No toothless space at midline of jaws. Mesial edges of teeth unserrated,
sometimes a few cusplets on mesial edges of lower teeth. Fins not falcate, posterior margins of anal and sec==ond dorsal moderately concave, those of pectorals and pelvics straight or slightly concave
B.
Teeth mostly with two or three cusplets on each side of cusp. Three or four rows of small intermediate teeth between upper anterior and lateral rows. Second dorsal fin origin over or slightly posterior to insertions of pelvic fins
C.
Teeth with only one cusplet on each side of cusp. One row of small intermediate teeth between upper anterior and lateral rows. Second dorsal fin origin over midbase of pelvis fins
A.
Anterior nasal flaps formed posterior tooth as slender barbels. Upper labial furrows extremely long, nearly equal to internarial and over half mouth width. Intestinal valve with 14 to 16 turns. No supraorbital crests on cranium