How can you tell female from male in fish?

Question

WE have 6 blue discus in our aquarium at home. We would like to know how to tell which are female and male. Is there a difference and what are the characteristics to tell?

Answer 1

It is difficult to distinguish the sexes outside the spawning season. When spawning the shape of the genital papillae is the best identification. It is pointed on the male and round on the female.

Answer 2

convinced, searching on the fish from the part, on the decrease area of the body in the route of the rear end of the fish there'll both be a fin thats style of d-formed or ones thats lengthy and promptly. the only which has the d-formed fin is the female, and the only which has the lengthy promptly fin(and convinced, it really is used what you imagine it really is for) is the male. For a image reference google the form between male and woman guppies (less than pictures) . they could have many diverse images showing you precisely what to search for. bear in ideas at the same time as choosing out guppies that is better to have 2-3 women per male. Too many adult males have a tendency to rigidity out the ladies.

Answer 3

It is difficult to distinguish between males and females. During breeding, the shape of the genital papillae is the best guide. It is round in female and pointed in males.
from: http://www.wetpetz.com/discus.htm

Answer 4

also, the male might get a bump on his forehead.