You can recognize the fish by the shape of their fins.

你可以根据鳍的形状来辨认这种鱼。

55,000 reptile skins from India, 19,000 big-eye thresher shark fins in Ecuador and 23 metric tonnes of pangolin in Asia have all been seized.

来自印度的55000张爬行动物皮、厄瓜多尔的19000只大眼长尾鲨鳍和亚洲的23吨穿山甲都被查获。

While the swimmer's movements may be smooth and fluid, people have neither fins to stay afloat or generate speed, nor gills to deal with going under.

虽然游泳者的动作可能是平稳和流畅的，但人们既没有鳍来保持漂浮或产生速度，也没有鳃用于在水下呼吸。

According to one scientist, the oreoglanis catfish have greatly enlarged paired fins, that together with their unique body shape, form a huge sucker.

据一位科学家表示，这种异齿属鲶鱼的偶鳍异常地大，加上它们独特的体形，构成一个巨大的吸管。

Small tadpole-shaped cold-water fishes with pelvic fins forming a sucker; related to lumpfish.

小的蝌蚪形冷水鱼，长有形成吸盘的腹鳍；与圆鳍鱼科有关。