Nematodes are among the most abundant animals on Earth. They occur as parasites in animals and plants or as free-living forms in soil, fresh water, marine environments, and even such unusual places as vinegar, beer malts, and water-filled cracks deep within Earth's crust.

Where do nematodes live?

Many species of nematodes are 'free-living', living in soil, sea and freshwater. These feed on bacteria, fungi, protozoans and even other nematodes, and play a very important role in nutrient cycling and release of nutrients for plant growth.

Are nematodes everywhere?

Nematodes, otherwise known as roundworms and in the phylum Nematoda, are everywhere. It's been estimated that around 80% of multicellular animals globally are nematodes. Nearly half are parasitic, many capable of causing diseases and problems in vertebrates and invertebrates alike.