How do I know if a fish is male or female?

[Matthys]

Title sums it up.

[Raul]

In which species ?

Question sums it all.

[Matthys]

bass

[maxke01]

saw this on another site

Biologists will tell you that you need to have training and tests on most bass. males seldom reach over 5 pounds, males will normally have elongated body, but when they are young, a lab is needed to determine the sex.

[Raul]

The only way at the naked eye you can differentiate a female from a male is by size except during the spawn, males northern subspecies seldomly reach 4 pounds, bigger than that it 's a female, males florida subspecies seldomly reach 6 pounds, more than that it 's female. Fish below 4 pounds are indistinguishable.

There 's another way, you add a drop of methilene blue solution to the anus, wait a couple of seconds and rinse, males have 2 openings in the genital papilae, females have 3. Easier said than done because it takes practice and being taught by someone who knows.

[Bassin_Fin@tic]

most of the time especially around spawn the males eyes turn kinda wicked red looking.I dont know how correct I am in the statement though.

[maxke01]

To tell during the spawn most males will travel in a certain perimeter while the female will stay still. The male chases other species away from the eggs while the female ensures nothing will get near

[Long Mike]

The female will be wearing lipstick.  

[Gatorbassman]

The one in my avatar is a male. The only way I know that is he was trying to spawn with a huge female.

[Redlinerobert]

Muddy is turning three shades of purple holding back what he really wants to post here.  ;D

[A_Glenn_2]

Ill say it, shake the bass if it rattles its a male ;D

[FD.]

Avid must not have read this one yet...

[BackOnTheWater]

Simple...I kiss them...the males hit a lot harder, but only once...the females don't slap quite as hard, but they smack me over and over again!