It's nearest living relatives are squid and octopus which, over evolutionary time, have both lost their shells 它是已经进化到已经没有壳的章鱼和乌贼的近亲
clad in furry armor jostling with one another beside the jets of superheated water for the best places, from which to graze on bacteria. 覆盖着有毛的甲壳, 互相争抢最佳位置来摄取喷出的炙热海水中的细菌
In places, it's riven by great fissures, from which superheated water loaded with dissolved minerals 在这里 海底裂缝中含有大量溶解矿物质的滚烫海水
A monkfish, almost indistinguishable from the sand on which it lies. 一只安康鱼 肉眼几乎不能辨别躺在那里的它和沙子
which it wipes carefully into it's jaws. 然后将挑选过的食物送进嘴里
The dense shoals, on which so many depend gather only when water conditions are perfect. 只有在水况非常好的情况下 才会出现这样的鱼群聚集
which is why it's also known as the glutton. 可以被认为是暴食型动物
Within a few days they develop spots of pigment which, when they're adult, they will use to communicate with one another. 几天后它们长出一些色斑 等到成熟后,就可以用这些色斑来互相联系
but each urchin has five teeth, which are self sharpening and are replaced every few months. 但是每只海胆有5个锋利的牙齿 而且每隔几个月就换牙
Individuals link together to form chains which can stretch for fifteen meters. 这些一个个单体组成的链条可长达15米