Several months ago we added a real find to our 55 gallon fish only tank. It was a large, stunning powder blue tang at a very reasonable price. I'd seen fish half its size be substantially more expensive. We were thrilled to bring it home and add it to our aquarium. It was easily one of the most beautiful fish in there.
As time went by, presumably as it became more comfortable, it became a terror. It is constantly tormenting our lemon butterfly and majestic angel... chasing them, batting at them with its tail, and trying to bite them. Interestingly, it doesn't seem to have any interest at all in the puffer fish or box fish.
Anyhow, we are going to bring the powder blue tang to our lfs tonight. Hopefully we will receive some kind of store credit, as it is large, beautiful, and in flawless condition... they will probably sell it the next day for $125 or more. It is very disappointing because of course we got attached to this beautiful fish. We can't watch the tank be a war zone, though.
We had to return our yellow tang months before this because it was also very aggressive. The lfs assured us that we would not have the same problems with this fish... low and behold...
Are tangs just generally extremely aggressive, or is it limited to the yellow and powder blue tangs?