根据以下句子意思,写出所指动物的英文单词.they do not have legs but they can move

根据以下句子意思,写出所指动物的英文单词.they do not have legs but they can move fast.they can opetheir mouths really wide.they can eat big animals.根据以下句子意思，写出所指动物的英文单词并翻译。they do not have legs but they can move fast.they can open their mouths really wide.they can eat big animals.