What are nematodes commonly known as?

Nematodes are commonly known as cylindrical, parasitic worms due to their characteristic elongated and cylindrical shape, and many species within this group are indeed parasitic in nature. They belong to a diverse phylum called Nematoda and are found in various habitats, including soil, aquatic environments, and as parasites in plants and animals. Their parasitic forms can infect a variety of hosts, including humans, where they can cause a range of health issues. Understanding this classification helps in recognizing the ecological role nematodes play, both in healthy ecosystems and in relation to plant and animal health.

This clarification illustrates their biological characteristics and ecological relevance, distinguishing them from other categories such as insects, non-parasitic worms, or fish, which do not describe nematodes accurately.