he just did it while looking at me in the middle of the tank.. there is only a lawnmower blenny in there with him and I don't think the blenny was close..
I forgot to mention, when he was shaking he was leaning to a side quite a lot..
he's never done it before but he is acting pretty crazy since I'm not feeding him as often as before..
he charged at my hand pretty badly today when I was doing some maintenance... he's insanely hungry now.. I gave in and fed him a bit.. I'll get him adjusted to every other day slowly..
I just did a water test and everything is normal, all levels at 0, Ph 8.0 sg