He wasn't a telepath, so he just gave another bemused/amused look at Harold snorting up some water, then aimed another random splash at that likely coughing fellow. No mercy.

And then he took a deep breath and pulled himself under the water; it stung his eyes a little, but it was a neat sort of vantage. The docks vanished into deep blues of shadows, and the sunlight banded down through the saltwater, cutting myriad patterns and cool colors across the water, and yellows and oranges across the sandy floor. Scotty wasn't a very good swimmer, and this was his first time diving into tropical water, but it was good.

He jumped up again, caught another breath, then gestured to Harold. "'Ere, look. It's... beautiful." Then he went back down again.