Difference Between a Male & Female Betta

Male and female betta fish are easy to distinguish by their fins, coloration and aggression levels. Pet stores make it even easier by labeling the bowls or containers of male and female betta fish. Generally, females are less expensive, less colorful and smaller.

  1. Betta Fish

    • Bettas, or Siamese Fighting Fish, are the colorful bodied, flowing fin fish most people recognize in little bowls at pet stores. They are a favorite among aquarium fanciers with their bright hues and charming antics. Adults are close to 3 inches in length with their lovely colors ranging from blues and reds to almost white. They are top dwellers, and can live 2 to 4 years in capitivity if proper care is taken.

    Males

    • Males are distinguished from females by their longer, flowing fins. The male body is longer and more brilliantly colored. In the presence of other fish, male bettas flare their fins to express their territory, show aggression and to tell other fish to "back off."

    Females

    • Female bettas are smaller in size and much less aggressive. Although their bodies are still colorful, their vividness is less impressive than their male counterparts. Beyond their size difference, it is easy to identify females by the small, white dot on their stomachs, directly behind their ventral or shorter stomach fins.

    Co-Existing

    • Great controversy emerges from debates on whether to keep betta fish together. The general school of thought is one male betta per tank. Females can co-exist together quite well; however, males will fight to the death when placed together in small areas. Male and female betas can be placed together, although, it is recommended that they only co-habitat while breeding.

    Breeding

    • Breeding should take place under one year of age. It is best to begin breeding around month 6. Female and males should get to know one another from afar before placing them in a tank together. Set the bowls beside each other for 3 to 7 days before the fish actually meet. The breeding tank should be 5 inches deep with a leave or piece of foam available to assist the male in blowing his bubble nest. Also, include a hiding place for the female, as males tend to be aggressive during courtship.

      Remove the female after the male drives her away from the bubble nest. The male will tend to the eggs for a day or two, and then feed the fry for the next couple of days. Within 3 or 4 days, the fry will begin to swim. When they are swimming competently on their own, remove the male, as he will eat them.