Doubletail

The Double Tail can be seen combined with Plakat, Halfmoon, and even Crowntails. It is a genetic trait that causes the caudal fin to grow into two lobes rather than one. The genes that cause this also cause the body to be shorter and the dorsal and anal fins to be very broad. As the body is effectively stunted in length, Double Tails are more prone to swimbladder problems and this also affects fry survival rates.

Doubletail Plakat                  Doubletail Halfmoon