I have a small marine tank (10 gallon) with a maroon clownfish, a coral-banded shrimp, and a few blue-legged hermet crabs. They are all at peace with each other and acting normally. The problem that I have with the clown is on either side of his body behind the gills there are these white protuberances. They resemble a white-head pimple and appear to be getting larger. His appetite is fine as well as his demeanor. Is it some kind of bacterial thing? I don't know.