Earth Worms are divided into segments or parts. They are found in salt and fresh water as well as in the soil. Earthworms are helpful to man as bait for fishing and more importantly, because they loosen the soil for roots to grow. There are 2700 species of earthworms. Earthworms have many enemies including animals that eat them and man who uses them. As you may see here is a casting of a Earth Worm.