1. Usually male bettas have noticeably longer fins than females
2. Usually females have short fins, but there are quite a few exemptions were male have short fins too, like plakat bettas.
3. Females are usually a bit more passing of tankmates, but sometimes this isn't true as females have been known to be just as aggresive as males sometimes
4. Females have what's called an opivoster right by there ventral fins, it's just a little white dot. But sometimes juvenile males have this same spot too
5. Males usually have larger, and longer anal fins
6. Males have what's called a beard. A darkened area by gills, of you put up a mirror they will flare and show this beard
2. Usually females have short fins, but there are quite a few exemptions were male have short fins too, like plakat bettas.
3. Females are usually a bit more passing of tankmates, but sometimes this isn't true as females have been known to be just as aggresive as males sometimes
4. Females have what's called an opivoster right by there ventral fins, it's just a little white dot. But sometimes juvenile males have this same spot too
5. Males usually have larger, and longer anal fins
6. Males have what's called a beard. A darkened area by gills, of you put up a mirror they will flare and show this beard
