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Alcichthys elongatus
''Alcichthys elongatus'' is a fish in the family Cottidae (sculpins),〔 and the only valid member of its genus.〔(Species listing for ''Alcichthys'' ) at www.fishbase.org.〕 It was described by Franz Steindachner in 1881.〔Steindachner, F., 1881 ''Ichthyologische Beiträge (X). Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften.'' Mathematisch-Naturwissenschaftliche Classe v. 83 (1. Abth.): 179-219, Pls. 1-8.〕 It is a marine, boreal fish which is known from the northwestern Pacific Ocean, including the Sea of Okhotsk and Japan. It dwells at a depth range of , and inhabits rocky reefs.〔 Males can reach a maximum total length of , but more commonly reach a TL of . The maximum recorded weight is .〔
''A. elongatus'' aggregates during the winter.〔 In the Russian Federation, its spawning season has been reported to occur from April to June.〔 It is preyed on by ''Gadus macrocephalus'' (the Pacific cod), ''Hemitripterus villosus'', and ''Hexagrammos otakii''.〔 Its own diet consists of bony fish such as ''Engraulis japonicus'' and ''Sardinops sagax'', crabs such as ''Erimacrus isenbeckii'', ''Oregonia gracilis'' and spider crabs, euphausiids such as ''Euphausia pacifica'', as well as cephalopods, polychaetes, and debris.〔
Due to its wide distribution in its region, as well as a lack of known threats, save for rare occasions in which it is caught in gill nets, the IUCN redlist currently lists ''A. elongatus'' as least concern.〔
==References==
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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