How do you know if your betta fish is a boy or girl?

There are a few key physical differences between male and female betta fish.

* Body shape: Male bettas are typically longer and thinner than females, with a more streamlined body shape. Females are shorter and rounder, with a fuller belly.

* Fins: Male bettas have longer, more flowing fins than females. The dorsal fin (the fin on the back of the fish) is particularly long and elaborate in males. Females have shorter, more rounded fins.

* Coloration: Male bettas are typically more brightly colored than females. They may have iridescent scales, while females are often a duller color.

* Behavior: Male bettas are more aggressive than females. They are more likely to flare their fins and display other aggressive behaviors. Females are more peaceful and docile.

It is important to note that these are just general guidelines. There can be some variation between individual fish. If you are not sure whether your betta fish is a boy or a girl, you can ask a veterinarian or experienced aquarist for help.