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gecko catshark
The gecko catshark (''Galeus eastmani'') is a species of catshark, part of the family Scyliorhinidae, native to the northwestern Pacific Ocean from southern Japan to Taiwan, and possibly also off Vietnam. It is a common, demersal species found at depths of . Its body is slender, with a pattern of dark saddles and blotches. The dorsal and caudal fins are edged in white, and there is a prominent crest of enlarged dermal denticles along the dorsal edge of the caudal fin. The gecko catshark is a schooling, opportunistic predator of bony fishes, cephalopods, and crustaceans. It is oviparous, with females producing two vase-shaped egg capsules at a time. This species is captured as bycatch, but does not appear to be threatened by fishery activities at present and has been assessed as Least Concern by the International Union for Conservation of Nature (IUCN).
==Taxonomy and phylogeny==
The first known specimen of the gecko catshark, a long female caught off the Izu Peninsula of Japan, was presented to American ichthyologists David Starr Jordan and John Otterbein Snyder by Alan Owston, a shipmaster from Yokohama. Jordan and Snyder described the species as ''Pristiurus eastmani'' in a 1904 volume of the scientific journal ''Smithsonian Miscellaneous Collections''. Later authors have recognized ''Pristiurus'' as a junior synonym of ''Galeus''. A 2005 phylogenetic analysis, based on mitochondrial and nuclear DNA, found that this species, ''G. gracilis'', and ''G. sauteri'' form a clade apart from ''G. melastomus'' and ''G. murinus''.
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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