inbreeding?

[philby4000]

i have 4 mollie fry, allfrom the same parent.

when it is possibe to sex them, should i separate the males and the females?

i ask because my dad recently told me how the fish in his tank (many years ago) inbred so much that he ended up with a 2 headed guppie

he's not lying, i've seen pictures

 

[ruffmeister]

2 headed fish, hmmm starnge as for sexing about 4 - 6 weeks