A dragon scale betta is a variant of the betta fish that has a beautiful textured look to the scales, according to Pet Solutions. Betta fish are commonly kept as pets in small containers, which is possible because they require less oxygen than other fish.
Betta fish, also called Siamese fighting fish, originated in the rice paddies of Thailand. They were first kept for fighting. The original fish had small fins and came in one color, a dirty greenish brown. They were selectively bred for their aggressiveness and willingness to continue fighting for hours. As of 2014, breeders focus on producing betta fish with exotic colors and elaborate fin shapes.