It all depends on the length of the fins. If its long its a male if its short its usually a females the exotic colors can help you tell as well. This is for any kind of fish, but mostly for Japense fighting fish and Feeder fish. if you have any other qustions you can contact me at, holly.mello@Yahoo.com
Feeder fish, How do you tell male from female of the?
Female guppies are larger and plainer. The male is distinctive for his long, flowing, colourful tail and generally brilliant colours.
Female fish will have a v shape in there tail fin more than the males.
male snakehead fish are thin and has bigger fins and head while female has fat body and has smaller fins
Do you mean female and male? If so, then the female betta fish is smaller and less elaborate than the male.
male
Different species require different methods to determine if the fish is male or female. Usually, the female is larger and rounder than the male. Some species have different shapes of fins. Some species have different colors. Without knowing what species you are trying to identify, it is difficult to give a definite answer.
Male Betta fish will attract a female by flaring and showing off their long flowing fins.
the male is bigger than the female
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.