Chloragogen cells are found in the coelomic fluid of earthworms. The coelomic fluid is the fluid that fills the body cavity of earthworms, known as the coelom. Chloragogen cells are one of the main types of cells found in this fluid.

Chloragogen cells are specialized cells that are responsible for the storage and metabolism of nutrients in earthworms. They have a granular appearance due to the presence of glycogen granules, which are storage forms of glucose. These cells are similar to the liver cells in vertebrates, as they perform similar functions such as nutrient storage and metabolism.

Chloragogen cells play a vital role in the earthworm's metabolism. They store excess nutrients in the form of glycogen when food is abundant and convert glycogen back into glucose when food is scarce. This glucose is then used as a source of energy for the earthworm's cellular activities.

The coelomic fluid, which contains chloragogen cells, also serves as a medium for the transport of nutrients, gases, and waste products within the earthworm's body. It helps in maintaining the osmotic balance and provides a protective cushioning for the internal organs.

Chloragogen cells are also involved in the detoxification of harmful substances in the earthworm's body. They can break down and eliminate toxins through various metabolic pathways.

Overall, chloragogen cells are important for the earthworm's metabolism, nutrient storage, detoxification, and maintaining homeostasis. They are found in the coelomic fluid of earthworms and are specialized cells that perform similar functions to liver cells in vertebrates.