pelvic fins

常见例句

The fanning movements with the pelvic fins are sporadic.
变径动作与腹鳍,是偶发事件。
Most species are small bottom dwellers with a weak suction cup formed by the fusion of their pelvic fins.
大部分为底栖鱼,特征是具一个由腹鳍愈合而成的吸力不强的吸盘。
Two-winged species have only the pectoral fins enlarged; four-winged species have Both the pectoral and the pelvic fins enlarged.
有些种类具双翼而仅胸鳍较大,有些则有四翼,胸、腹鳍皆大。
Any of numerous usually small spiny-finned fishes of the family Gobiidae, having the pelvic fins united to form a suction disk.
鰕虎鱼鰕虎鱼科的一种通常小的带棘鳍的鱼，具有聚合成吸盘的腹鳍
The small, thin ray, sometimes found in front of (and bound to) the first large ray is counted for pectoral fins and ignored for pelvic fins.
胸鳍第一根大鳍条前所发现的小且细的鳍条是被计数，但腹鳍的小且细的鳍条是被忽略的。
The specimen collected is a sub-adult which can be identified by a prominent pale-yellow edge right behind opercula and clear caudal, pectoral and pelvic fins.
图中所示乃亚成鱼，特徵是鳃盖后有一条明显的淡黄边，尾鳍、胸鳍和腹鳍皆透明。