hagfish是什么意思_hagfish的用法_词性_词根

双语例句

Hagfish have a mesonephric kidney and are often neotenic of their pronephric kidney.

八目鳗类鱼有中肾，并且通常是其前肾的新生物。
They're kind of like eels or hagfish or lampreys, but different.

它们有点像鳝鱼、丑鱼或者鳗鱼，但并不相同。

百科

体延长呈圆柱状，体後方侧扁。眼退化为皮肤所覆盖。无上下颌。口腔外缘具四对须；口腔外侧左右各有两列齿，其内列齿之2-3颗齿之基部愈合，齿列式(6-8)+3/2+(6-7)。鳃孔每侧6个，彼此间距小，聚集成群而呈不规则分布，左侧最後一个大于其馀鳃孔。体侧各有一列黏液孔，可依位置区分为鳃前区、鳃区、鳃肛区及肛後区等四区，本种鱼之鳃区不具黏液孔，故黏液孔数分别为(16-19)+0+(36-42)+(6-9)，总数为62-67。无鳞。肛门位于体後端。无背、臀、胸及腹鳍，仅有尾鳍。体色呈灰褐色，背部中央无白带。本种为1975年由沈世杰教授等发表于台湾的新种。Quadratus taiwanae 为其同种异名。

释义

a primitive jawless marine vertebrate distantly related to the lampreys, with a slimy eel-like body, a slit-like mouth surrounded by barbels, and a rasping tongue used for feeding on dead or dying fish

盲鳗。

词源

"early 17th cent.: from HAG1　+ FISH1．"