49+ Betta Fish Fin Anatomy. See the internal, external, and different characteristics of male and female bettas. Selective breeding over the years has lengthened the caudal fin.
Betta fish types and appearance.
These longer delicate and beautiful betta fish tails we now know have however slowed down the movement. Some people might believe that plakat are actually females since they have fins and tails. If you're keeping your betta in a vase or a fish bowl with no filter, you should already be on a weekly. However, plakat betta fish have short fins, so do.