Tertio, Conseil said, the subbrachians, whose pelvic fins are attached under the pectorals and hang directly from the shoulder bone.

第三目是副鱼，康塞尔说，腹是接在胸鳝的下面和挂在肩骨上。

The keels, finlets, and corselet help direct the flow of water over the body surface in such as way as to reduce resistance (see the figure).

鱼的背, 腹, 胸帮助（鱼儿）对准水方向, 以这种方式来减少水对鱼身的阻力。

Do you see the fins of the gold-fish? It has two breast-fins, two belly-fins, a back-fin, a tail-fin, and a fin on its under side near the tail.

你看见金鱼的鱼了吗? 金鱼有胸、腹、一背、一, 还有巴附近的一臀。

The Nopoli rock-climbing goby, no bigger than a few centimeters, scales hundred-meter-tall Hawaiian waterfalls, inching its way up by alternately attaching the suction cups on its mouth and pelvic fins.

诺波利攀岩虾虎鱼，体型不超过几厘米，爬上百米高的夏威夷瀑布，通过嘴部和腹上的吸盘交替吸附向上爬。