very hardy fish, doesnt care for the kole tang that much since it picks on him quite a bit but he annoys him back. they eat a lot of alge but its good to try and suppliment its diet with other things. some people have them starve to death. you could try pellet food containing alge, dried nori, alge disc. the kole and lawnmower fight over the nori they love it. they are a reefsafe and peaceful fish and i think one of the coolest fish in the tank. ours seems to be a neat freak cleans small pieces of rock out of his hole and any snails that get in there also. picks them up, carries them accross the tank and spits them out.