I should add that it's a 33g tank, 20g sump, fowlr, skimmer, temp is 75, ammonia 0, nitrites 0, nitrates near 0, salinity around 1.022, pH 8.2. What seems strange is that he was eating fine yesterday but later in the day just decided to sit around by his rock and today he's still doing the same thing. The blenny is out swimming around acting normally and eating invisible stuff off the rocks. Also the lighting is 2x39w T5's with a good reflector. Since he seems to want to hide in a partially shaded area, maybe he's not used to lighting that bright? But then again, he didn't seem bothered by it yesterday.