In this photo you can see another Butterfly Fish, the Lined Butterflyfish (chaetodon lineolatus). The Butterflyfish, often mixed up with the Angelfish, are easily identified. Butterfly fishes have a deeply compressed body and a protruding snout. They do not grow as big as the Angelfishes.
The Lined Butterflyfish is the largest of this group, attaining up to 30 cm in length. They use their long snouts to find their favorite food: the sea anemones.