anal fin的用法和样例:
例句
- 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。 - The male shows elongated rays in its anal fin and yellow pearl organs on the jaws and opercula during breeding season.
雄鱼的臀鳍鳍条特长,交配季节两颌和鳃盖会长出黄色的珠星。