It isn't often that you get to hypnotize pirates. It's even less often that pirates just happen to stumble into your territory, no coercion needed.
Yet here he is. A pirate, presumably, floating limply in the water. Your water. But you don't remember luring him here... a sunken pirate, perhaps?
Nevermind that. He's about to be a dead pirate, unless he gets some oxygen into his human lungs.