He waits and watches, keeping his eye on the shark Kisame summons. That is definitely easier than trying to lure something in, and while he never thought of petting a shark like that, it's clear the shark enjoys it.

The signs aren't ones Naoki recognizes, and the sight of a shark swimming right at him like that causes a rush of adrenaline. He wastes no time getting as much space between himself and the fish as possible, bracing his feet against the sea floor in case he needs to push away quickly.

He's fed enough animals to know that sometimes they get a little enthusiastic eating an offered treat.