How can you tell if a betta fish is male or female?

Bettas are a species of fish that is easy to sex. Males have the long flowing fins and brilliant colors that owners find attractive, and are what is usually sold in shops. Females are drabber and have short rather stubby fins. It is not always easy to find females for sale in pet shops. I hope that helps you out.

sounds like you have a female a eggs

The females do not have the ornate fins that the male has. If you have a betta with huge, decorative fins, it`s a male. the female looks just the same but with regular (average) size fins.

The males have the big, pretty tails and fins while the females aren't quite as brightly colored and don't have the fancy tails and fins. The females also don't get all exited and try to attack everything else.

the female has a short more blunt shaped tail and shorter fins, males have long flowing tails and fins and are more colorful

Fin size and color aren't always the best method for sexing Bettas. Plakats are short-finned Betta splendens and the males have fins as short as the females. Also young males sold at many fish stores haven't grown their full finnage yet and look very similar to young females. Also, a common myth is that females aren't as brilliantly colored as their male counterparts when in actuality the coloration is just as beautiful. All female egg-laying Bettas have an ovipositor. This is the tube through which the eggs are deposited and it happens to be visible on the underside of the Betta. To the naked eye it looks like nothing more then a small white dot centered behind the ventral fins. If the ovipositor is present the fish is female and conversely a lack of an ovipositor indicates a male Betta.

They look different. The male species has beautiful colors and elaborate fins they are also larger then females. You most likely have a female laying eggs.

Male Bettas have much longer, and wavy fins, and are generally nicer colors.

Sounds like a gravid female. Males have long decorative fins Females have short fins and are usually less colorful.