hello! right now i have 2 week old fancy guppies(9), and i think sailfin mollies(2) and i wanted to know how long it should take to be able to sex them. i think i can kinda tell with the guppies b/c some of the have a black spot on their tail fin and their top fin. but its hard to see the mollies b/c right now they are all in a breeder net, and i cant get a good look at the underside, but im thinking they are both females. if any one has had any experince on this please let me know. thanks!
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