👉 Ichthyocystis is a type of crustacean that belongs to the family Crustacea, which includes the aquatic animals known as crabs and lobsters. It is an important part of marine ecosystems and plays a crucial role in nutrient cycling by absorbing nutrients from the water. Ichthyocysts are also found in many types of freshwater fish and can be found in various habitats such as rivers, lakes, and oceans.