pelvic fins

同根派生

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。