Double Tail: This tail type is a very beautiful one, where the caudal fin is split in the middle, producing two caudal peduncles and what are referred to as tail lobes (fins). A true Double Tail should have an even split right to the body and have two caudal peduncles. The dorsal fin on a Double Tail is extended. Breeding Double Tails to Double Tails is a very risky cross, as this will produce fish with spinal deformities and short bodies due to the twin caudal peduncles. This tail type can sometimes be seen in combination with any of the Delta Tails and Half Moon bettas.