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Fourhorn poacher
The Fourhorn poacher (''Hypsagonus quadricornis'', also known as the Four-horned sea-poacher〔(Common names of ''Hypsagonus quadricornis'' ) at www.fishbase.org.〕) is a fish in the family Agonidae (poachers).〔(''Hypsagonus '' ) at www.fishbase.org.〕 It was described by Achille Valenciennes in 1829, originally under the genus ''Aspidophorus''.〔Cuvier, G. and A. Valenciennes, 1829 (Nov.) (998 ) ''Histoire naturelle des poissons.'' Tome quatrième. Livre quatrième. Des acanthoptérygiens à joue cuirassée. v. 4: i-xxvi + 2 pp. + 1-518, Pls. 72-99, 97 bis.〕 It is a marine, temperate water-dwelling fish which is known from the northern Pacific Ocean, including the Sea of Okhotsk, the Sea of Japan, the Bering Sea, the Kuril Islands, and Washington, USA. It is non-migratory, and dwells at a depth range of , most often at around . It inhabits sediments of sand and gravel. Males can reach a maximum total length of , but more commonly reach a TL of . The maximum recorded weight is , and the maximum recorded age is 7 years.〔
The Fourhorn poacher is preyed on by ''Hippoglossus stenolepis''.〔(Organisms Preying on ''Hypsagonus quadricornis'' ) at www.fishbase.org.〕 Its own diet consists of crustaceans including shrimp, crabs, isopods, amphipods, and ostracods, as well as bony fish, gastropods, and polychaetes.〔(Food and Feeding Habits: Diet Composition of ''Hypsagonus quadricornis'' ) at www.fishbase.org.〕
==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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