Honey Boo Boo & Mama June -- Family Pool Day ... The Socks Stay On!

One can only assume Mama June just discovered water ... because while Honey Boo Boo played around in the pool with her usual youthful exuberance ... her mother swam around WITH HER SOCKS ON.

The Thompsons hit up a pool while on vacation in Panama Beach, FL. According to the photog who snapped the pics, Mama June swam about 30-40 laps in the pool ... never removing her socks.