Half moon blue betta
The Halfmoon Betta Siamese fighting fish is a fairly new species of Betta that has come about through selective breeding. The Key characteristic of the Halfmoon Betta is its tail. The tail, when held erect, should form a half-moon shape of no less than 180 degrees. This beautiful and rare species is sought after by aquarium enthusiasts and makes a great addition to any home aquarium.