He's shoving eggs into his shell and running off to hide them under his rock hidey.

He gets out of his shell, cleans all the eggs out. Hops back into his shell & buries the eggs. Now he's in the water cleaning himself off.

I'm kind of glad I saw him do this or I'd be smelling something foul over the next couple of days wondering what the heck it is.
Anybody else seen their crabs do this?