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How do you tell if a fish is a molly or platy?
I have about 3 kinds of mollies and 3 kind of platies in my tank. I have these gold colored ones but I can't tell if they are mollies or platies. The reason why I want to know this is because I am planning to breed them and I want to avoid cross-breedings.
It looks like a molly to me. I did a bit of research about orange platy's and molly's and the backfin does not look like a platy to me.
What is a back fin?
As in he fin at the back of the fish
So the only major difference is the backfin?
Hard to tell from these pics. . . but looks like a platy to me. Could you try to get a picture of them flaring their fins and attach as a thumbnail?
Okay I will try
Platies & mollies cannot cross-breed. Platies/swordtails, mollies/guppies those pairs can though.