I recently bought a used larger aquarium to put my growing fish in but unfortunately the tank came with fish also. The lady I bought it from had no idea what kind of fish she had. There are 3 silver dollars, a convict and two fish I am unsure about. I went to 3 lfs and they all gave me different answers. They will all take them in but only one will buy them from me and he offered $30 for all 6 fish. He said they are red devils which are a fish he hates to sell so he wouldn't give me any more for them. The other two lfs said it was against policy to buy fish but would love to take them off my hands for me. One said it was a midas and the other said flowerhorn. I've looked online and i have no idea which it could be because he looks like all of them to me. One is about 8 inches the other is 6 inches. I've heard red devils are very aggressive, territorial and love to eat but these fish are not at all. I haven't seen any aggression at all. They are actually pretty boring and just float around. Anyone know what they are and how much they are possibly worth?