2 male mollies


Hello,today I introduced a new male and female molly into my 65 gallon. I have a total of 2 males and 4 females. It seemed my original male was picking on the new male (who is larger) but upon closer inspection he is genital nipping and attempting to mate with my new boy. Is this a dominance thing? Natural alpha fish behavior? Should I be worried about aggression?


I always go by 1 male to 5 females in live bearers. Reduces aggression between males and stress in females.


It's a natural behavior when dominance shows up. Most of the time it will stop once the other male knows his place. If it keeps going on after 1-2 weeks, I would get rid of one of them.
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