Fish Identification: Find Family
Glossary 2 families of frill and cow sharks FishBase

Chlamydoselachidae Chlamydoselachidae - (Frilled sharks) Distribution: Japan, California, Europe, and nothern Chile. Gill openings 6. First gill with the margin continuous across throat. Mouth terminal. No barbels. Small spiracles present. No nictitating lower eyelids. Single spineless dorsal fin. Body elongated and eel-like with prominent keels on abdomen; anal fin larger than dorsal fin. 3-cusped teeth in upper and lower jaws. Benthic on the outer continental and insular shelves and upper slopes, at depths usually between 120 and 1280 m, but occasionally taken at the surface. Rare, little known deep-water sharks. Ovoviviparous, embryos feed solely on yolk (Ref. 50449). 8-12 young in a litter. Probably feed on deepwater cephalopods and bottom fishes. Maximum size 196 cm. chlamys (gr.) = cape, frill; selach- (gr.) = sharks and rays

Hexanchidae Hexanchidae - (Cow sharks) Distribution: Atlantic, Indian, and Pacific Oceans. Most species are deepwater inhabitants of the outer continental shelves and upper continental slopes down to at least 1875 m depth. Gill openings 6 in Hexanchus, 7 in Heptranchias and Notorynchus. Margin of first gill discontinuous across throat. Mouth subterminal with large, bladelike, comb-shaped teeth in lower jaw. One dorsal fin. Caudal fin with strong subterminal notch. Cow sharks are ovoviviparous and lack a yolk-sac placenta. They feed on relatively large marine organisms, including other sharks, rays, bony fish, crustacean and carrion. Species range in size from 140 to 480 cm. hexa- (gr.) = six

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