The double tail betta fish type is one of betta fish type which has an unusual tail that differentiates it from other bettas. This type has unique a caudal fin where its caudal fin is split all the way to the base into two equal parts to form to distinct tails. This betta tail type has been bred over the years to achieve this tail type and it also available in many varieties of colors making every individual a unique living art in the tank.