Betta fish grow up to 3 inches long. Male betta fish grow slightly larger than females, but they still stay within this 3-inch limit, according to About.com.
According to About.com, betta fish originate in Asia and live in shallow ponds, such as rice paddies. Captive breeding has led to subspecies with longer fins and populations of the fish outside of their native habitats. A tank size of at least 2 gallons is required to provide the proper environment for these fish, and males need to be kept separate from one another to prevent fighting. Male betta fish are more brightly colored and have longer fins and beards than females.Learn More
It is not a good idea to keep multiple female betta fish in the same tank. Although it is possible to do so under the right conditions, the fish may still fight with one another.Full Answer >
Betta fish flare their gills as a way to intimidate other fish. Flaring their gills makes them appear larger and more threatening.Full Answer >
Betta fish primarily make bubbles to construct nests for their eggs and fry. Only male betta fish, which are also known as Siamese fighting fish, create such nests. Male betta fish are the only ones that provide parental care.Full Answer >
Bettas prefer not to be placed into a tank with other fish and do best when they swim alone. These fish are not schooling fish, so they will fight other bettas when placed in a tank together, according to Pet Sitters International.Full Answer >