I had a dream. A sea reptile accompanying a dinosaur underwater. They are friends for a long time and the reptile makes sure his friend is safe. He swims with him on surface whenever he needs air. What he's doing there, sightseeing, treasure hunting or whatever, it does not matter.

That "shark" is there for you to have something to look at.
The pose is suggestive, but it is nothing more than that. Any dirty mentions will be severely punished.