Crustaceans

Crustaceans are a large, diverse group of aquatic animals that inhabit both saltwater and freshwater environments. They are distinguished from other groups of aquatic animals by their hard, external skeleton and jointed appendages. Crustaceans are important to the global food chain as they are a major food source for many species, including fish, birds, and humans. They also play a vital role in many aquatic ecosystems, as they act as scavengers and are crucial components of the food web. Along with providing food, crustaceans also cycle nutrients and provide habitat for other organisms.