That depends on the Species of the fish. The only thing that does not differ is that the female always produces the eggs (ova) and the male always produces the spermatozoa (milt).
You look at it eyes if they are blue it's a female if it's green its a male!
Feeder fish, How do you tell male from female of the?
Do you mean female and male? If so, then the female betta fish is smaller and less elaborate than the male.
male
Male Betta fish will attract a female by flaring and showing off their long flowing fins.
They can come either as male or female.
Female
All female creatures develop eggs with or without a male. The male is only needed to do the fertilizing. So the answer is no.
Male and female fish have not been designated like other animals are, into things like cows and bulls, so they are simply called male and female.
yes
A MALE FISH HAS A LONGER BOTOM FIN THAN A FEMALES
the male betta fish makes the nest.