i was swimming in the ocean but then walked around underwater. bikini bottom tier. i didnt think it was odd i could breathe there underwater but it was a little heavy. the water was crystal clear just a light blue hue lots of sunlight. depth maybe 5m. the ground was sand. i didnt see any animals. i tried to walk but it was very exhausting. i wanted to move around but then woke up. not bad - peaceful dream for a change.