Hi, I have a large yellow tang that's roughly 10-11 years old, he beat out the coral beauty for food, and then the cleaning crew got the best of the beauty. Today I took a gamble and bought a small blue tang thinking it would be ok. It seems that the yellow tang pulls up along side of the blue tang, raises his dorsal fin, and thrashes his tail against the blue tang. I have a large fairy wrasse, fire goby, 2 clowns, and he leaves them alone. What do I do? I feel bad taking him into a store cause he's been in this thank for 10 years, but I would like to have some nice fish too. Here's a pic of the dude we call him Cartmen (after South Park). The crew at Barrier did give me fair warning, total "my bad".