Ok, my 38 gallon finally cycled- added fish! I moved fish from my existing tank. This made room for the addition of 5 turquoise rainbows I picked up at Petsmart yesterday. Got them home, acclimated and started to watch them. They schooled together so beautifully last night and this morning I turned on the light to find the largest of the 5 in the center of the tank with barbs and tetras and the other 4 rainbows hiding in the plants. As I observed them it appears to me that I have 3-4 males and 1-2 females. Hard to tell but many of them were flashing their beautiful colors and I think 2 were not (females?) They were reluctant to come out to eat but did so when I turned the lights off. One odd thing I saw-this large male (2 1/2 inches) got right along side my kissing gourami (male) and shimmied himself very tight to the side of the gourami and moved the gourami horizontally across the tank. The gourami wasn't bothered by it- didn't attempt to chase or bite. The rainbow made no moves to chase or bite the gourami. Now the dominant rainbow is in the middle of the tank (lights are off) and the other 4 are hiding out again. Whats up? I thought they were supposed to school and hang out with each other. I know I will need a bigger tank around Christmas as these get larger (my strategy for a larger tank with my husband). Petsmart was not able to tell which were females or males when he caught them for me. He also said they would be semi aggressive fish and that I would not be able to return them for aggressive reasons. I had read they were peaceful community fish. What gives?