n.large elongate scaleless oceanic fishes with sharp teeth and a long dorsal fin that resembles a sail
同义词：lancetfishwolffish
英汉双解大词典
lancet fish
1.
N（名词）
either of two deep-sea teleost fishes, Alepisaurus ferox or A. borealis, having a long body with a long sail-like dorsal fin: family Alepisauridae 帆蜥鱼