How can you tell the difference between a girl kayo and a boy kayo fish?

You can tell the sex of fish by the size and shape of their fins and tails. If in doubt, just ask them.

a boy has a fin looking thing on its stomach and a girl doesn't (if you buy them it should say it on there)

You can tell a female from a male by its dorsal, and fins. The male is larger, alot more colorful and has long fins, the female on the other hand, has shorter fins, are smaller, and not as...

The female fish will be the one telling the male fish what to do and when to do it! Look for the male fish inside one of your hiding places within the tank.

In most fish if you look at them with their head straight forward so it looks like they are skinny in Females usually one side is a little fatter than the other. But i think that might just be in...