Originally Posted by Fiferjanis
I got four platties about a month ago, all female. I checked this several times in the store, in the bag, in the tank... They've been in quarantine by themselves with a couple of shrimp. They started to grow bigger... And now one has a wiener/gonopodium-thing. I've heard of gender-bending fish... Has anyone else experienced this? Or do I just have a knack for collecting Platy-dudes?
Sorry, no gender bending going on here. All livebearers LOOK like females until they mature. Then the males show their stuff. This is totally normal. If you want guaranteed males and females, you need to buy pregnant females and males that are already showing their gonopodium. Otherwise it's just "Pot Luck"
Hope this solves your mystery