Yesterday my son, Max and I went to Pets Mart to buy fish. We have a 30 gallon tank and one lone fish left alive. We noticed there were several tanks of mollies and platys. They were $1.00 each if you buy 10. cool. So we asked the attendant for 5 orange/black ones, five white ones, five dalmation ones and five black ones. The attendant said we couldn't buy the black ones with the other ones. We thought he was joking, but he said the black mollies were bullies and they did not play well with others :).
We ended up buying 10 white ones and 10 orange/black ones. The attendant put them all in the same bag and we took them home. When it was time to release them into our tank, all of the white mollies went to one end of the tank and all of the orange/black platys went to the other side of the tank.