Siamese Fighter Betta Male

B. splendens usually grows to a length of about 6–8 cm (2.4–3.1 in).^[17] Although aquarium specimens are widely known for their brilliant colours and large, flowing fins, the natural coloration of B. splendens is generally green, brown and grey, while the fins are short; wild fish exhibit strong colours only when agitated. In captivity, Siamese fighting fish have been selectively bred to display a vibrant array of colours and tail types.^[18][19]