Odd behavior, Sherbert the Halfmoon
Got him with almost no fin left from petco, they have bad lighting by the betta so I'm not surprised nobody took him. I take an LED flashlight with me when betta browsing.
So his fins healed most the way but he picked up popeye from the four-way I had him exercising fins in with my sorority. It healed but he's still got a "larger" eye. Not any bigger in diameter but sticks further out.
So what he's been doing when the lights been on too long is he'll wedge his nose down against the rocks with that eye safely hidden in a dent then curl his body up over himself to give himself tail shade.
There's no infection, parasite or anything... just really odd behavior since he can hide his head elsewhere!