Hello everybody. Yesterday we bought the first fish for our 40g tank. We got 4 Platys (3 females and one male). I read in a book that Platys will have a dark spot under the belly if they are expecting. Below is a picture of "Lola" (my children named her). Please let me know if she is expecting little Lola's. Obviously the male I got had nothing to do with this, but who knows what was going on in the tank at the shop