I went to petco tonight and they had these 3 crays in there. I asked how much they were, and they looked around for a price for a few minutes before someone else came up and said "Oh, those came in with the feeders, just give 'em to the guy." So now, I have the crays. They are all seperated. They told me that they could be housed together, but since they didn't know anything else about them, I don't trust them. Can anyone give me an ID so I can research them some more?

It's about 2.5" or so