通鳃鳗科 cutthroat eel ; Synaphobranchidae
蚓鳗科 Moringuidae ; spaghetti eels
七鳃鳗科 Petromyzontidae ; Petromyzontis ; lampreys
糯鳗科 Congridae
海鳗科 [鱼] Muraenesocidae ; pike eels pike congers
线鳗科 Nemichthyidae
月尾鳗科 Cyematidae ; Cyematoidei
长颈鳗科 Derichthyidae ; DENTICIPITIDAE
康吉鳗科 konger ; hor morsk ; tengeri angolna
七鳃鳗，八目鳗一种七鳃鳗科的原始细长淡水或溯河产卵鱼，特点是长有无。
Any of various primitive elongated freshwater or anadromous fishes of the family Petromyzontidae, characteristically having a jawless sucking mouth with rasping teeth.
蛇鳗科鱼类广布于各大洋的热带和亚热带大陆架水域，可依靠尖突的头部和尖秃骨化的尾端在沙土或珊瑚礁后潜穴。
Distributed in continental shelf depths of all tropica and subtropical oceans, Ophichthidae can burrow in sand and mud substrates or coral reefs by pointed rayless tail tips or acute snouts.
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