The Siamese fighting fish (Betta splendens) also known as betta, is a popular species of freshwater aquarium fish. B. splendens usually grow to an overall length of about 7 cm, including fins. Although known for their brilliant colors and large, flowing fins, the natural coloration of B. splendens is a dull green and brown, and the fins of wild specimens are relatively short. Brilliantly colored and longer finned varieties (i.e. Veiltail; Delta; Superdelta; and Halfmoon) have been developed through selective breeding. Properly kept and fed a correct diet, B. Splendens lives approximately 2–4 years in captivity but 5 is not uncommon. It is possible for them to live up to 10 years in rare cases.
All photos via Beta/Fighter Fish Lovers World on FB