人们甚至可以未经许可就对植物或无脊椎动物进行迁移，只要它们未被归类为有害动植物。
People aren't even required to seek permits to move plants or invertebrate animals around as long as they are not classified as pests.
这些怪物不仅供养着植物，而且是由细菌、浮游生物和无脊椎动物组成的一个复杂的食物网。
The bugs sustain not only the plant, but an intricate food web of bacteria, plankton and invertebrates.
小鱼和无脊椎动物也以这些植物类生物为食，然后则是众所周知的小鱼吃虾米，大鱼吃小鱼。
Small fish and invertebrates also graze on the plant-like organisms, and then those smaller animals are eaten by bigger ones.
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