anal fin

Anal fin rays ii , 5 ;

臀鳍ii，5；

Old World freshwater catfishes having naked skin and a long anal fin more or less merged with the eellike caudal fin .

东半球的淡水鲇鱼，体表无鳞，有类似鳗鱼尾鳍的很长的臀鳍。

Anterior portion of anal fin with narrow black margin .

第一背鳍相当黑色，末梢部白色的与基部地。

In addition , the anal fin has a curvature that fits the round shape .

还有，尾鳍有一个弯曲度刚好适合鱼的圆型身体。

Any of various freshwater fishes of the family Cyprinidae related to the carps and minnows , especially a Eurasian species , Leuciscus cephalus . " It has one dorsal and one anal fin , Both long and Both connected to the rounded tail . "

白首鲤一种相关于鲤鱼和鲦鱼的鲤科淡水鱼，尤指欧亚品种，圆鳍雅罗鱼背鳍和臀鳍各一，形长，均与尾鳍基部相连，尾鳍圆形