dorsal fin

Bowhead whales are one of just a few whales that can live year-round in the Arctic because they have no dorsal fin.

北极露脊鲸是少数一整年待在北极的一种鲸鱼因为它们没有背鳍

His dorsal fin was down and his huge pectorals were spread wide.

它的脊鳍朝下耷拉着,巨大的胸鳍大张着.

Largest family of living sharks; found worldwide esp. in tropical waters; dorsal fin lacks spines: requiem sharks including tiger sharks and soupfin sharks.

最大的鲨鱼科；世界各地都有，尤其是在热带水域；背鳍无刺；包含鼬鲨和油翅鲨的真鲨科。

a primitive, bony freshwater fish(amia calva)of central and eastern north america, with a long, spineless dorsal fin.

弓鳍鱼北美洲中部和东部的一种原始、多骨的淡水鱼（弓鳍鱼弓鳍鱼属），具有长的无脊的背鳍

The dorsal fin is ornamented with these two colours.

空气垂直舵由这两色装饰.

steller's goldfish once came, it was classified as varieties upper. we all know, the balance of dorsal fin in fish organs, nature does not.

虎头金鱼一经问世，就被列为上等品种。众所周知，背鳍是鱼类的平衡器官，自然界中没有。

The dorsal fin is spinous.

背鳍有很多刺.

From the butterfish genus, whose oval bodies are very flat, I observed several adorned in brilliant colors and sporting a dorsal fin like a sickle, edible fish that, when dried and marinated, make an excellent dish known by the name karawade;

至于躯体压缩作蛋形的硬鳍属中，我看到颜色鲜艳的燕雀鱼，脊鳍像镰刀一样，那是可以食用的鱼，晾干浸在盐水中，称为卡拉瓦的美味的好菜；

The shark's dorsal fin was cut off by the fisherman.

鲨鱼的背鳍被渔夫割了下来.

It is not unusual to see a striper's dorsal fin whizzing past you while casting in knee deep water.

这不是不寻常的看到一个变色的背鳍驰驱，过去你而铸造的膝盖深的水。

First dorsal fin dusky to black.

第一背鳍暗色到黑色的。

Dogfishes having a spine in each dorsal fin. It strikes a bug's back with is forelegs and feelers.

背鳍上各有一刺的角鲨鱼。它（蚁）前腿和触角敲打臭虫的背部。

The dorsal fin is the vertical fin on the back of a fish and certain marine mammals.

背鳍就是在鱼或者某些海洋哺乳动物背上的垂直鳍。

male lollypop darters have knobs along the top of their dorsal fin that swell large and bright yellow& presumably to mimic eggs and inspire females to lay some.

雄性小鳍镖鲈沿背鳍顶部生有膨大的明黄色小疙瘩，估计这是模仿卵的样子来诱导雌性产卵。

A goldfish LanChou belongs to the egg, dorsal fin.

兰畴属于蛋种金鱼, 无背鳍.

Any of several baleen whales of of the family Balaenopteridae having longitudinal grooves on the throat and a small pointed dorsal fin.

几种喉部有纵向沟槽且背鳍小而尖的须鲸科长须鲸。

Any of numerous compressed deep-bodied tropical fishes with sandpapery skin and erectile spines in the first dorsal fin.

多种身体扁平细长的热带鱼，皮肤粗糙如砂纸，前部的背鳍可直立如硬刺。

a shark's dorsal fin

鲨鱼的背鳍

any of several whales of the family balaenidae, characterized by a large head, whalebone plates in the mouth, and absence of a dorsal fin.

露脊鲸：露脊鲸科中的几种鲸，特征为头部硕大、嘴边长有鲸须而无背鳍。