帆状的第一背鳍在游动时提供了稳定性。
Its sail-like first dorsal fin provides stability while swimming.
第一个（刺背鳍是在前面的黑。
鲨鱼的背鳍像刀样迅速划破水面。
鲨鱼的背鳍被渔夫割了下来。
它的背鳍就在我的前面，我尖声呼救。
Its dorsal fin was in front of me. I was screaming for help.
我们能知道是因为可由大背鳍区别为雄性。
We know this because we can distinguish the male by their large dorsal fin .
细长的大型海生无鳞鱼，有尖牙和船帆形的长背鳍。
Large elongate scale less oceanic fishes with sharp teeth and a long sail-like dorsal fin.
咬啮鱼类或倒鲶鱼类鲶目(鲶鱼类)双背鳍鲿科的鱼。
Squeakers or upside-down catfishes fishes of the Family Mochokidae, Order Siluriformes (catfish). See Fishbase for more information on this Family.
它们的背部是军舰的灰色，最上方是呈锯齿状的黄色背鳍。
Their backs were battleship gray topped with a saw-toothed line of small yellow dorsal fins.
背鳍、脂鳍和尾鳍稍带浅黄色，胸鳍、腹鳍和臀鳍灰白色。
Dorsal fin, tail fin and fat fins slightly yellow, pectoral fin, and ventral fin Tunqi gray.
如果水中有血的话，那么很自然的背鳍就会兴奋地游来游去。
When there is blood in the water, it is only natural that dorsal fins swirl around excitedly.
驼背鲸有一个较小的背鳍，大约是背部三分之二接近尾部的中央。
The humpback has a small dorsal fin located towards the tail flukes about two-thirds of the way down its back.
云南倒刺鲃的年龄可以通过鳞片、耳石、背鳍条上的年轮特征来鉴定。
The ages of S. yunnanensis can be identified through the characteristics of the annual rings of the scales, otoliths and dorsal fin spines.
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。
It is not unusual to see a striper 's dorsal fin whizzing past you while casting in knee deep water.
我们要做的科学观察最重要的部分是看看在他们的背鳍上是否有小疤痕。
The most important part of our scientific observation was to see whether they had nicks on their 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。
Any of several whales of the family Balaenidae, characterized by a large head, whalebone plates in the mouth, and absence of a dorsal fin.
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。
Among the hundreds of guppy varieties, the best known feature of the male fish is its gorgeous dorsal and caudal fins.
它的顶部是钴蓝色，下面和银白色；有着明显的背鳍，还有着长长的、能致命的矛状上颚。
They are cobalt-blue on top and silvery-white below, with a pronounced dorsal fin and a long, lethal, spear-shaped upper jaw.
鲈鱼：塌鼻子、食肉性淡水硬骨鱼类，椭圆形的身体、多刺的背鳍；肉质美味。
Perch: snub-nosed bony freshwater fish with an oval body and a spiny dorsal fin; the flesh of this fish is highly valued.
雷珠阿测量队于2005年开始测量，他们用网捕获14头独角鲸，在其背鳍装上电子传感器。
Laidre's team began taking measurements in 2005, by capturing 14 narwhals (Monodon monoceros) in nets and attaching the electronic gear to the animals' dorsal fins.
这条雄性的鱼，背鳍是蓝色，上面带着红色圆形点，科学家们表示会联想到奥巴马的竞选标志。
The dorsal fin coloration of the male is a circular red spot ringed with blue which scientists said reminded them of Obama's campaign logo.
神仙鱼的体型既高又扁，有着向后舒展的长长背鳍和臀鳍，常以虾、蠕虫等为食，体长可达12厘米。
The Angel Fish has an elongated and flat shape with long dorsal and anal fins extending backwards. It usually feeds on shrimps and worms and can measure up to 12 cm long.
这是我吃过的最好吃的鱼，不过，我也得到了一个惨痛的教训，鳜鱼的背鳍有毒，被它扎伤，会非常疼。
It was the most delicious fish I think I've ever eaten, although I learned the hard way that the guiyu's dorsal spines contain a poison which can inflict a painful wound if you are stuck by them.
这种古老的爬行动物背上有着标志性的船帆状背鳍，它常常会被误认为是一种恐龙，甚至出现在恐龙玩具中。
This reptile, with its iconic sail-shaped back, is often mistakenly identified as a dinosaur, and is even included in packages of toy dinosaurs.
一开始，人们猜想这一背鳍是用来进行体温调节的。借助它，动物可以克服外界剧烈的温变而保持体温稳定。
It was originally suggested that the fin was used for thermoregulation — self-regulation of body temperature — even when outside temperatures may vary drastically.
一开始，人们猜想这一背鳍是用来进行体温调节的。借助它，动物可以克服外界剧烈的温变而保持体温稳定。
It was originally suggested that the fin was used for thermoregulation — self-regulation of body temperature — even when outside temperatures may vary drastically.
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