Workers from the Japanese Aquarium captured video of deep-sea shark lurking about the shallows of Awashima Port. The species, Chlamydoselachus anguineus or frilled shark, is not unknown from shallow water but rare. The frilled shark as a global distribution as is found from 0-1570m (5151ft). It can reach 2m (6.5ft) in length and feeds on other sharks, squid and bony fish. Currently it is listed by IUCN as Near-Threatened. More here at fishbase.