I just noticed that my foxface has a round protrusion on its chin (I know fish don't have chins, do they?). The growth appears to be the same color as its skin (opaque) and is very round and smooth. Sorry about the poor quality pic. I will try to post something better in the morning. The bump is the white section in between the two black stripes. Any ideas? I've never seen anything like this before on any of my fish.