The Robustus Butterfly (Chaetodon robustus), also known as the Three-Banded Butterfly, is a beautiful and elusive fish found among the reefs of the Atlantic and Caribbean Ocean. They have a silver or white body with three dark vertical stripes and yellow accents. Reaching a maximum size of 6 inches, they do best in FOWLR tanks with tankmates of similar temperaments. They are omnivorous by nature, feeding on worms, invertebrates, crustaceans and algae in the wild. In the home aquarium, they should be offered a wide variety of well-balanced foods, including occasional clam, mysis and brine, as well as nori seaweed.