Hello, I'm brand new to this forum; I found it while searching for answers to a new symptom I'm seeing in one of my fish. I have a parrot fish who is suddenly acting strange. He spends the whole day on the rocks in a corner of the tank, kinda in a slanted position. At first I thoguht he was dying, but everytime I approach and he sees me, he swims around as normal, and his appetite is normal. When I leave or he is done eating, he resumes his position at the bottom in the corner. He has no signs at all that anything else is wrong. No markings, no discoloration, no signs of being bullied. pH levels are normal, all other fish are normal. I've had this fish for at least a couple of months, and he's just started doing this about three days ago. Any ideas? I'd really hate to lose him.

Any help would be much appreciated, thanks for reading!
