I have a 75 gallon salt, working to be a reef. looking for a good fish that will make the "center piece" of the tank. as of now i have 2 clowns (lil nemo's lol sorry cant remeber there names), 3 green chromis, cleaner shrimp, goby, diamond goby, and a bunch of snails. Looging for the one good center piece. It need to be something i can house in the tank for life, im not looking to buy a fish then have to upgrade the tank size later. Any sugestions??