Earthworms can be found everywhere in the world where there is soil. There are over 6,000 different types of worms. They have soft bodies and can be brown, pink or red in colour. Earthworms have five hearts to pump blood through their bodies. They use their skin to breathe and do not have lungs.
The smallest earthworms are about 1 cm long. The giant Gippsland earthworm is the largest earthworm in the world. It can grow to 9 ft long and is only found in Australia.
Earthworms cannot see or hear. They have tiny hairs on their bodies that help them move through the soil. Earthworms have no teeth. They feed on soil, dead leaves and grass, and algae.