A crawdad, also known as a crayfish, is a freshwater crustacean resembling a small lobster. They typically inhabit rivers, streams, and ponds, where they hide under rocks or in burrows. Crawdads are known for their pincers and segmented bodies, which can vary in color from green to brown or even red. Crawdads play an important role in their ecosystems as both predators and prey. They feed on decaying plant matter, insects, and small fish, helping to recycle nutrients in the water. Additionally, they serve as a food source for various animals, including fish, birds, and mammals.