There are two types of mollusc that are actively venomous.
有两种随时释放毒素
软
动物。
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That encourages the growth of planktonic algae, and thus of everything that feeds on such plankton, or feeds on what feeds on them, including jellyfish, and also various molluscs and crustacea that loggerheads enjoy as an appetiser.
这有利于浮游藻类生长,因此也有利于以这些浮游生物为食的
物,或以这些
物为食的
物生长,包括水母,还有各
各样的软
物和甲壳
物,这些都是红海龟的最爱。
In early fish-like vertebrates more than 500 million years ago; in a common ancestor of arthropods, such as insects, spiders, and crustaceans, at around the same time; and then in the cephalopod mollusks around 300 million years ago.
在 5 亿多年前的早期类鱼脊椎
物
;节肢
物的共同祖先,如昆虫、蜘蛛和甲壳类
物,大约在同一时期;然后是 3 亿年前的头足类软
物。