There is no one specific way to tell the difference between male and female fish. Different species have different ques, and in the vast majority of fish, there is really no reliable external way to tell a fish's sex.
It depends on the species.
Mollies come in males and females. They do not change sex.
Most types of fish can not be told by visual differences and must be sexed by venting. Which is looking at the openings under the fish to judge size, shape and distance between to determine sex.
Sexed Up was created in 2002.
There is no such thing as inter sexed people. Please rephrase.
Conures must be DNA sexed in order to differentiate between the sexes. They cannot be sexed visually.
Fish for the most part are not easily sexed, however, some species do have identifying marks or attributes called sexual dimorphism. Species that do not display a difference visually are called monomorphic. To determine the sex of Monomorphic the easiest method is Venting.
Sexed.
sexed
If your Betta is developing the long fins, bright colours and male temperament, then you can safely assume it is a late developing male fish and was incorrectly sexed as a youngster.
-sexed up -horny
get him or her de sexed (: