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''Helicophagus'' is a genus of shark catfishes native to Asia. ==Species== There are currently three recognized species in this genus: * ''Helicophagus leptorhynchus'' Ng & Kottelat, 2000 * ''Helicophagus typus'' Bleeker, 1857 * ''Helicophagus waandersii'' Bleeker, 1858 ''H. leptorhynchus'' is known from the Chao Phraya and Mekong River drainages in Indochina. ''H. typus'' inhabits rivers of Sumatra and southeast Borneo. ''H. waandersii'' is known from medium- to large-sized rivers of Sumatra and Peninsular Malaysia.〔 ''H. leptorhynchus'' grows to about 47.2 centimetres (18.6 in) SL. ''H. typus'' reaches a length of about 37.7 cm (14.8 in) TL.〔 ''H. waandersii'' has a maximum recorded length of about 70.0 cm (27.6 in) TL. The stomachs of the specimens of ''H. waandersii'' are more or less filled with mollusks, usually bivalves.〔 ''H. waandersii'' enters flooded forests.〔 ''H. waandersii'' migrates upstream when water levels begin to rise at the beginning of the flood season and moves downstream as water clears at the end of the flood season.〔 Unlike ''H. waandersii'', ''H. leptorhynchus'' stays in permanent river channels and does not move into flooded forests. However, it also migrates upstream and downstream with changes in the water level.〔 ''H. leptorhynchus'' feeds primarily on bivalves.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Helicophagus」の詳細全文を読む スポンサード リンク
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