Not quite underwater, but for this special post I’m sure we can make a small exception. It was only a few meters away from the water.
A washed-up, and unfortunately deceased, specimen of the extremely rare (I think it’s on the brink of extinction) Paddii Menstruaalis. It was quite intact, with no discernible wounds or bite marks. It may have died from Menopausitus, a well-documented illness among these species.
Photographed lying on the beach.