<Tr> <Td_colspan="2"> Chlamydoselachus anguineus Garman, 1884 </Td> </Tr> <Tr> <Td_colspan="2"> Range of the frilled shark </Td> </Tr> <P> The frilled shark (Chlamydoselachus anguineus) is one of two extant species of shark in the family Chlamydoselachidae, with a wide but patchy distribution in the Atlantic and Pacific Oceans . This species is found over the outer continental shelf and upper continental slope, generally near the bottom, though there is evidence of substantial upward movements . It has been caught as deep as 1,570 m (5,150 ft), although it is uncommon below 1,200 m (3,900 ft). In Suruga Bay, Japan, it is most common at depths of 50--200 m (160--660 ft). Exhibiting several primitive features, the frilled shark has often been termed a living fossil . It reaches a length of 2 m (6.6 ft) and has a dark brown, eel - like body with the dorsal, pelvic, and anal fins placed far back . Its common name comes from the frilly or fringed appearance of its six pairs of gill slits, with the first pair meeting across the throat . </P> <P> Seldom observed, the frilled shark may capture prey by bending its body and lunging forward like a snake . The long, extremely flexible jaws enable it to swallow prey whole, while its many rows of small, needle - like teeth make it difficult for the prey to escape . It feeds mainly on cephalopods, as well as bony fishes and other sharks . This species is aplacental viviparous: the embryos emerge from their egg capsules inside the mother's uterus, where they survive primarily on yolk . The gestation period may be as long as three and a half years, the longest of any vertebrate . Litter sizes vary from two to fifteen, and there is no distinct breeding season . Frilled sharks are occasional bycatch in commercial fisheries, but have little economic value . </P>

What ocean zone does the frilled shark live in