shark shark species requiem shark family named heavily snout small bronze coloured shark reaching length slender body long pointed snout sized dorsal fins elongated rear tips shark widely distributed western kenya southern china northern australia inhabits warm shallow waters close shore common shark predator bony fishes cephalopods crustaceans species viviparous growing embryos sustained term connection mother females reproductive cycle bear litters pups month gestation period shark meat range given low reproductive rate listed taxonomy shark described german der named honour collected type specimen new_guinea american elevated rank genus type species species called shark phylogeny evolution evolutionary relationships shark fully resolved study based morphology tentatively grouped shark borneo shark shark shark creek shark shark shark results molecular phylogenetic analyses inconsistent supporting parts hypothesis study resolve shark position detail study reported close clade formed sharks study concluded sister species borneo shark teeth apparently belonging shark recovered formations united_states brazil earliest fossils date description shark slim bodied species long narrow pointed snout unlike species snout highly circular eyes large equipped protective membranes narrow lobe skin anterior rim arched mouth bears furrows corners sources report pores series pores corners mouth enlarged report upper teeth number rows narrow smooth edged central coarse base lower teeth number rows narrow smooth edged pairs fairly short gill slits pectoral fins fairly short pointed like shape dorsal fin medium sized triangular originates roughly pectoral fin free rear tips second dorsal fin small low originates middle anal fin base dorsal fins long free rear tips subtle ridge prominent notch present caudal dorsal origin caudal fin caudal fin developed lower lobe longer upper lobe ventral notch near tip skin covered overlapping oval shaped dermal denticles horizontal ridges leading marginal teeth species bronze white barely noticeable pale band flanks pectoral pelvic anal fins lighter margins dorsal fin upper caudal fin lobe darker margins shark reaches length distribution habitat shark common widely distributed tropical western found kenya indian_ocean including sri_lanka pacific_ocean found vietnam taiwan southern japan indonesia new_guinea northern australia usually found shallow waters reported depth data shown shark tends long distance movements caught individuals having moved initial location longest known distance travelled individual biology ecology shark forms large groups sharks australian sharks males females generally separately bony fishes form main shark diet cephalopods crustaceans making remainder parasites species include shark viviparous like requiem sharks embryos exhaust yolk supply yolk sac develops connection mother provides nutrition females birth year pups following gestation period months measure long sexual maturity attained long maximum lifespan years human interactions harmless humans shark caught line gear commercial fisheries range meat sold fresh dried small size limits economic importance low reproductive rate render susceptible given existing levels exploitation assessed northern australia shark makes catch catch losses appear diminished population iucn given regional assessment concern
Hardnose shark