【动】 臀鳍。
-
Small scale, only ventral cortex ventral fin and even anal with abdominal edge.
鳞小,腹面仅腹鳍甚至肛门具皮质腹棱。
-
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。
-
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。
-
Old world freshwater catfishes having naked skin and a long anal fin more or less merged with the eellike caudal fin.
东半球的淡水鲶鱼,体表无鳞,有类似鳗鱼尾鳍的很长的臀鳍。
-
The sex can be identified base on the shape of anal fin, and there are some obvious pearl organs on anal fin of male individuals during reproduction seasons.
可根据臀鳍的形状来鉴别青海湖裸鲤的雌雄,在繁殖期间,雄性个体在臀鳍部位出现明显的珠星。