What is special about earthworms reproductive system?

Earthworms have a unique reproductive system that is hermaphroditic, meaning each individual possesses both male and female reproductive organs. During mating, two earthworms exchange sperm, which they later use to fertilize their own eggs. They produce a cocoon from a special gland, which contains the fertilized eggs and serves as a protective environment for the developing young. This reproductive strategy enhances their ability to reproduce in diverse environments.