Just noticed my bristle tooth looks emaciated. I feed formula 2 pellets, red, green and purple algae, nori, mysis. And brine shrimp cyclopeeze, chopped clams, oyster eggs, spirulina and a mixed food I can not think of at the time. Have had him for at least 9 months. His behavior hasn't changed, just looks thin. Our other fish, a yellow tang, Clarky. Clown, pair of black clowns, lawnmower blenny, watchmen goby, neon blue goby and Bengai. Cardinal are all fine in our125 gallon reef tank. Any suggestions?