... diurnal fishesn.昼夜移动性鱼类 jawless fishes无颌鱼类 armored fishes甲胄鱼纲 ...
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同义词: jawless vertebrate agnathan
以上来源于: WordNet
Any of various primitive elongated freshwater or anadromous fishes of the family Petromyzontidae, characteristically having a jawless sucking mouth with rasping teeth.
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。
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