- It spends it's days hiding four hundred meters down
白天它躲在400米深的海底 - But as night falls, it ascends up to the reefs, to look for food.
到了晚上,它就游上来 到珊瑚礁附近寻找食物 - It's graceful shell contains gas filled floatation chambers,
它那优美的外壳由充满空气的小室组成 - that control it's depth.
使它可以控制深度 - It's powered by a jet of water, squirting from a siphon
它的动力来自虹吸管喷射的水流 - but it travels shell first, so it can't see exactly where it's going.
由于它是倒着游 所以它自己也很难看清楚自己要去哪里 - 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
that control it's depth. 使它可以控制深度
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