What is a nematode?
Nematodes, also called roundworms, are worm-shaped animals. They are not the same as earthworms, which are segmented. Nematodes are non-segmented. There are 28,000 described species of nematode, most of them less than 1 cm in length. Many species are free-living and can be found in various environments: moss, rotting fruit, soil, the oceans. There are also 16,000 parasitic species. They can infect most mammals, birds, fish, reptiles, lizards and insects. Some species can infect plants. For more information check out wikipedia.