ing platys

Question
I was wondering how to sex platys.

Answer
Hi Roberto,
This is very easy! The bottom fin on the fishes belly is what you look at. In the males, it is pointed and slender...in the females it is shaped like a fan or just like a regular fin.
The best picture I could find is of male and female swordtails. Since swordtails are very closely related to platies this will give you a good idea. Copy and paste this link into your search box and you should be taken right there-

http://www.aquariumfish.net/catalog_pages/livebearer_swords/swordtails.htm#gonop...

I hope this helps!
Karen~