how's the wrasse doing?
I've had a juvenile yellow wrasse for a few months now and a couple weeks ago i noticed he was flashing on the rock. when I took a closer look, his skin looked whitish. i thought that he may also have been flashing on the sand which turned it white but i never saw that. he hasn't done it again and his color went back to yellow. his face also started developing those orange/pink stripes so I chalked it up to growing pains.
I also read that he could've been hunting for food or had something stuck in his mouth or gills so who knows.