牠们中的大多数都生活在海里，并且具有覆盖着带刺细胞的臂。
Most of them live in the sea and have arms covered with stinging cells.
这种无脊椎动物身后拖着长长的布满刺细胞的触角和多褶的口腕，可捕猎水中的浮游生物和小鱼。
The invertebrate hunts by trailing its long sting-cell-covered tentacles and ruffled mouth-arms through the water, combing for zooplankton and larval fishes.
海蜇的蛰刺实际上来自海蜇体上微小的刺丝囊刺细胞。
The jellyfish sting actually comes from tiny nematocysts on the jellyfish body.
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