Nematode - Wikipedia, the free encyclopedia
The sexes are usually seperate but there can be a hermaphrodite roundworms.
Nematodes- (Phylum Nematoda "thread species") Also known as round worms, there are between 10k and 25k species. They live in sediment or the tissues of other organisms.
Phylum Nematoda on Pinterest | Anatomy, Fresh Water and Body Shapes