food that settles along the bottom, sifts through the sand, which aerates the aquarium substrate, and is well known to eat cyanobacteria, unsightly brown bacteria, and filamentous green algae efficiently. Because it can become aggressive towards other tank animals and may even kill fish and other invertebrates, feeding it meats, such as clams, mussels, scallops and shrimp along with various vegetation may reduce this behavior. Overall, it can support a healthy aquarium environment. References Hermit crabs Crustaceans described in 1804