This variety of Betta has a striking, elaborate tail that differentiates it from other Bettas. The Twin-Tail has a split tail, almost giving the suggestion of having two tails. A similar fish, the Crown Tail, has a teardrop shape to its tail. The Twin-Tail Betta is a type of “Siamese” Fighting Fish. These fish have been bred over the years to enhance the fins and remarkable variety of colors of the males, as well as making them increasingly combative. Therefore, only one male should be kept in a tank; however, smaller, shorter-finned females may be housed together with caution. In addition, a male and a female should only be housed together temporarily for breeding purposes. Females can be as colorful as the males, although, they rarely have the long finnage that is seen with the males.
An ideal environment for the Betta is a well-filtered aquarium that holds a steady temperature of between 75° and 86°F. For best care, Betta splendens should be kept singly in aquariums of at least 1/4 gallon. It also prefers a variety of hiding places amongst the foliage of freshwater plants. Therefore, having an appropriately-sized aquarium with a filter and heater is essential for the proper care of these otherwise hardy and colorful freshwater aquarium fish.
The Betta can be bred in the home aquarium. For breeding purposes, males and females can be temporarily housed together. Once laid by the female, the eggs are placed inside a bubble nest and tended by the male Betta. Fry appears in about 24 hours and must be fed very small food initially, such as crushed or powdered flakes and newly hatched brine shrimp. Fry will also take finely chopped hard-boiled egg yolk.