Abyssobrotula galatheae

… Four species of fish have been collected from the deepest part of the trench (hyperhassal zone) of 6000m or more. All of them belong to the families Langfish and Scallopidae and are considered to be deep-sea benthic. The deepest fishes collected so far include Careproctus amblystomopsis , a species of Langfish collected by the Soviet research vessel Beechad II at a depth of 7579m in the Japan Trench, and Abyssobrotula galatheae , a species of Scallopidae collected by the American research vessel Pillsbury at a depth of 8370m in the Puerto Rico Trench. There are many closely related species of Langfish and Scallopidae that live from the coastal areas on the continental shelf to the bottom of the deep sea zone of the trench, and there are no fundamental differences in the body structure and shape of the fishes, despite the large differences in environmental factors such as pressure, light intensity, and water temperature. …

*Some of the terminology that mentions "Abyssobrotula galatheae" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…　6000m以深の海溝部(超深海帯)からいままでに4種の魚類が採集されており，いずれもクサウオ科とイタチウオ科に属し，深海底生性と考えられる。従来の魚の採集記録で深いものをあげると，ソ連の調査船ビーチャジ号(2世)が日本海溝の7579mの深さから採集したクサウオ科コンニャクウオ属の1種Careproctus amblystomopsis，アメリカの研究船ピルスベリー号がプエルト･リコ海溝の8370mから採集したイタチウオ科の1種Abyssobrotula galatheaeなどがある。クサウオ類やイタチウオ類は，陸棚上の沿岸域から海溝部の超深海帯の海底にまで近縁種が生息し，圧力，照度，水温など大きな環境要因の差にもかかわらず，魚の体構造，体形に基本的な差が見られない。…

※「Abyssobrotula galatheae」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報