+Nematodes are ubiquitous [worms](/wiki/worm), often microscopic, yet astonishingly diverse, thriving in nearly every habitat from deep oceans to arid deserts. These unsegmented [invertebrates](/wiki/invertebrate) play crucial roles as free-living decomposers or as parasites affecting plants and animals alike.
+## See also
+- [Biology](/wiki/biology)
+- [Microbe](/wiki/microbe)
+- [Ecology](/wiki/ecology)
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