Several of these classes are specific types of fish, for example: jawless fish, like lampreys and hagfish, and cartilaginous fish, like sharks and rays.

这纲类便是鱼类，比如：无颚纲鱼形动物，像七鳃鳗、盲鳗和软骨纲鱼，像鲨鱼和魔鬼鱼。

Now, the hagfish is free from the jaws of death.

盲鳗逃脱了鲨鱼死亡之口。

Others are making medicine from spider venom, learning how to regrow limbs from axolotls, or turning hagfish slime into bulletproof vests.

其它研究包括用蜘蛛毒液制造药物，学习如何从蝾螈身上再生四肢，或者把盲鳗粘液变成防弹背心。

Isn't that gross? I mean, a hagfish can produce enough mucus to fill a bucket in a minute.

不恶心吗，盲鳗分钟内，就可以产出水桶粘液。

Fishes like the hagfish maintain their internal saltiness at the same level as the ocean around them.

像盲鳗这样鱼类会将体内盐分保持在与周围海洋相水平。

Having persisted through multiple mass extinction events, hagfish have just about seen it all.

在经历了多次大规模灭绝事件后，盲鳗已经见识过切。

But hagfish slime threads rival the properties of materials like nylon.

但盲鳗黏液线可与尼龙等材料特性相媲美。

Those contents happened to be thousands of kilograms of live hagfish, also known as slime eels.

这东西是成千上万活盲鳗，也被称作黏液鳗鱼。

It lodges in the shark's delicate gills, and as the shark chokes and tries to clear the slime, it releases the hagfish.

这种黏液卡在鲨鱼脆弱鳃中，当鲨鱼窒息并试图清除黏液时，盲鳗便可以逃出来。

The hagfish's slime is so remarkable that people are trying to emulate it.

盲鳗黏液十分不寻常，以至于人学着利用。

The hagfish contracts the muscles surrounding some of its slime glands, causing the cells to eject their contents into the seawater.

盲鳗收缩自己黏液腺周围肌肉，导致细胞将其内物喷出到海水中。

And Mr Savitz points to an American programme, inspired by the defensive secretions of hagfish, to develop a slime that could be used to gunk up the propellers of incoming USVs.

萨维茨先生指出个受七鳃鳗防御分泌物启发美国项目，旨在开发种能堵塞来袭无人水面舰艇螺旋桨黏液。

It was only marginally more fish-like than its earlier relatives, hagfish and conodonts, with which it shared a common ancestor.

它仅比其早期亲戚——七鳃鳗和锥齿动物——稍微多点像鱼，它共享个共祖先。

Around a hundred slime glands line each side of the hagfish's body.

盲鳗身体两侧都有大约百个黏液腺。

Whale falls  are big events in the deep sea, attracting thousands of scavengers, like  octopi, hagfish, and deep-sea sharks.

鲸鱼坠落是深海中大事件，吸引了成千上万食腐动物，如章鱼、盲鳗和深海鲨鱼。

The hagfish ties itself in yet another knot to gain leverage and yank off the meat.

盲鳗将自己打在另个结上以获得杠杆作用并拉下肉。

Like modern lampreys and hagfish, conodonts were jawless fish, and they were one of the earliest and most successful groups of vertebrates.

像现代七鳃鳗和盲鳗样， 牙形石是无颌鱼类，它是最早也是最成功脊椎动物群之。

This hagfish has detected a dead fish using its keen sense of smell and the tastebud-like organs dotting its skin.

这只盲鳗利用其敏锐嗅觉和遍布其皮肤味蕾式器官发现了条死鱼。

And because the hagfish's skin is so loosely attached to the rest of its body, the pressure from the bite causes the hagfish's essential organs to slip out of the way, avoiding damage.

这是因为盲鳗皮肤松散地连接着其他身体部分，鲨鱼咬合压力导致盲鳗重要器官从皮肤中脱落来避免伤害。

The world's oceans teemed with sharks, primitive ray-finned fishes, hagfish, and even our very early ancestors, the lobe-finned fish.

世界上海洋里充满了鲨鱼、原始辐鳍鱼、七鳃鳗，甚至还有我远祖——肉鳍鱼。