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butterfly fish,common name for certain members of the Chaetodontidae, a family of reef-dwelling tropical fishes with compressed bodies and small mouths and teeth. Butterfly fish are carnivorous, feeding on crabs, barnacles, and other invertebrates. The fast and aggressive common butterfly fish, 5 to 8 in. (12.5–20 cm) long, is marked by dark lines through the eyes and near the tail. The angelfishesangelfish,
common name for certain members of the Pomacanthidae, a family of brightly colored reef-dwelling tropical fishes with compressed bodies and small mouths and teeth.
..... Click the link for more information. were formerly classified with the butterfly fishes but are now treated as a separate family. The butterfly fishes are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
..... Click the link for more information. , subphylum Vertebrata, class Actinopterygii, order Perciformes, family Chaetodontidae.