Crabs eat a mixed diet, ranging from small prey like algae, seaweed, worms, clams, and shrimp to larger prey like snails, mussels, squid, and small fish. Some crab species eat harder foods like barnacles, starfish, and sand dollars. #crab #crabs #underthesea #thelittlemermaid #wildlife #crabeating #seafood #beach | Naturalist's Guide