Beta Fish: Male Vs. Female

Scientists refer to betta fish as Betta splendens, and this species is commonly known as the Siamese fighting fish. Male and female betta fish exhibit differences in size, physical characteristics and behavior.

  1. Size

    • Mature male betta fish normally have larger bodies and fins compared to female betta fish. Female betta fish reach a length of 2 inches when fully mature, according to BetaFish.com

    Male Physical Characteristics

    • Male betta fish have colorful, long fins that they use to attract females and ward off other male bettas.

    Female Physical Characteristics

    • Female betta fish have short, rounded tails and may appear less colorful than male betta fish. They also have a white dot on the underside on their abdomen.

    Behavior

    • Male betta fish flare their fins in aggression when other male betta fish swim into their territory. Female betta fish do not exhibit this behavior, but may nip at other female bettas.

    Breeding

    • Male betta fish build bubble nests to protect the female betta̵7;s eggs by gulping air from the surface of the water and blowing bubbles. Males may perform this action even if they have not bred with a female betta.