Peacock fish is a fish species belonging to the family Loricariidae in the order Loricariiformes. The peacock fish is named after its tail, which resembles a peacock opening its screen. Alias; Peacock fish, Phoenix tail fish, Rainbow flower fish, Rainbow fish, Gubi fish. The peacock fish has a slender body shape, and its morphological changes mainly occur in the tail fin. Common tail fin shapes include round tail, pointed tail, shovel tail, etc. The peacock fish is native to Trinidad, Venezuela, northern Brazil, and the West Indies in Central and South America. Peacock fish is one of the popular aquarium ornamental fish, which has been commercially bred in large quantities. People have bred varieties with different colors and fin shapes. These artificially cultivated fish species require higher water temperatures than their wild counterparts.