这些无法归类的动物包括被称为奇虾的会游泳的大型食肉动物，以及叫做威瓦亚虫的软体动物，它们以岩屑和藻类为食。

These unassignable animals include a large swimming predator called Anomalocaris and a soft-bodied animal called Wiwaxia, which ate detritus or algae.

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同样的道理，类似蛤和虫这样的滤食动物在大部分区域都埋在地下。

For the same reason, filter feeders, like clams and worms, burrow underground in most regions.

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事实上，一些裸鳃类动物因吃了有毒海绵也带有了毒素，使得像这种鼻涕虫的生物它们自己也对掠食者会造成致命的毒害。

And indeed, some nudibranches store up toxins from their diet of poisonous sponges, making the slug-like creatures themselves deadly to predators.

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