Others are involved in the important job of breaking down decomposing material in the soil, thereby releasing nutrients for use by living things. Some of these are notoriously parasitic (such as those which live their lives in an animal's intestinal tract). Three classes of worms we would expect to find in the rainforest are flatworms, nematodes (roundworms) and annelids (segmented worms and leeches). There are roughly half a dozen categories of worms and quite a few of these are marine species. But while you're looking at all the wonderful and colourful animals of the rainforest, don't forget that the smallest creatures sometimes have the most important roles. Perhaps you've never spared any thought for worms, except when you are doing some backyard gardening and inevitably find some earthworms with your shovel.
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