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Japanese bullhead shark
The Japanese bullhead shark (''Heterodontus japonicus'') is a species of bullhead shark, in the family Heterodontidae. It is found in the northwestern Pacific Ocean off the coasts of Japan, Korea, and China. This benthic shark occurs at depths of over rocky bottoms or kelp beds. Measuring up to long, it can be identified by its short, blunt head, two high dorsal fins with anterior spines, and pattern of irregularly shaped, vertical brown bands and stripes. The Japanese bullhead shark is a docile, slow-swimming species that feeds mainly on shelled invertebrates and small bony fishes. Reproduction is oviparous, with females laying spiral-flanged eggs in communal "nests." This species is of little interest to fisheries.
==Taxonomy==
The Japanese bullhead shark was originally described as ''Cestracion japonicus'' by ichthyologists Nicholas Miklouho-Maclay and William John Macleay, in an 1884 volume of ''Proceedings of the Linnean Society of New South Wales''. The type specimen is a female caught off Tokyo, Japan. Other common names used for this species include bull head, cat shark, Japanese horn shark, Cestracion shark, and Port Jackson shark (which usually refers to ''Heterodontus portusjacksoni'').
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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