Earthworms

• Earthworms are used to decompose organic matter into worm feces, which are called worm castings. These worm castings are extremely nutrient-rich and are beneficial to garden plants and seedlings. When people have a composting center set up in their backyards, they may use earthworms to help break down table scraps, egg shells and vegetables into rich compost they can use.
  
  

Maggots

• Maggots look like worms and are sometimes referred to as tiny white worms. They are actually fly larvae. Flies are usually attracted to rotting meat as opposed to vegetables, which is why meat shouldn't be added to home compost. Flies will lay their eggs in a dead animal or on rotting meat, and then the maggots will hatch and begin to decompose, or eat, the meat.
  
  

Roundworms

• Roundworms are another type of worm that acts as a decomposer. They decompose organic matter including fungi as well as bacteria. These decomposers are also parasites, which can affect people and pets. If you do have a compost pile or come into contact with something that is decomposing, it is important to wash your hands with soap and water after the exposure.
  
  

Terebellida

• Terebellida are sometimes called bristle worms, and these worms are amphibious, meaning they spend time both on land or underground and in the water. These worms decompose organic matter in sand and soil as well as on the ocean floor.