dorsal fins

Cavorting around the Nautilus was a school of triggerfish with flat bodies, grainy skins, armed with stings on their dorsal fins, and with four prickly rows of quills quivering on both sides of their tails.

面前是一群箭鱼，压扁的身躯。皱纹的皮肤，背脊上有箭链式的武器，在诺第留斯号周围游来游去，鼓动着它们尾巴两边的四排尖刺。

visualization and measurement study of vortex flow over delta wing with dorsal fins

带背鳍平板三角翼分离涡流场的显示与测量

Among the hundreds of guppy varieties, the best known feature of the male fish is its gorgeous dorsal and caudal fins.

在成千上百的孔雀鱼品种中，雄鱼最著名的特色就是它们华丽的背鳍和尾鳍。

Large food fish of warm waters worldwide having long anal and dorsal fins that with caudal fin suggest a three-lobed tail.

世界各地温暖水域中的大型食用鱼，背鳍和臀鳍很长象有三个分叶的尾巴。

their backs were battleship gray topped with a saw-toothed line of small yellow dorsal fins.

它们的背部是军舰的灰色，最上方是呈锯齿状的黄色背鳍。

experimental investigation of perturbation by karman vortex-street in turbulent boundary layer outer region visualization and measurement study of vortex flow over delta wing with dorsal fins

平板湍流边界层外区卡门涡街扰动的实验研究带背鳍平板三角翼分离涡流场的显示与测量

Their wispy dorsal fins contain toxin-filled needles used to dissuade would-be predators.

它们的小束状的背鳍含有毒素-充满针刺过去常常劝阻将到的食肉动物。

Smooth dogfish of Pacific and Indian oceans and Red Sea having white-tipped dorsal and caudal fins.

太平洋、印度洋和红海水域的平滑狗鲨，长着白尖的脊背和尾鳍。

small smooth-skinned sharks lacking spines on dorsal fins.

背鳍上无刺表皮光滑的小型鲨鱼。

body covered with ctenoid scale, lateral line absent, two dorsal fins, pelvic fin fused to form elongated suction disc.

体被栉鳞，无侧线，背鳍两个，腹鳍愈合成长吸盘状。