[ There's a smirk that tugs on the corner of his lips at her reaction - a smug expression, which she might eventually come to learn is his default state of being. ]

Sure, but you'd be surprised just how deep it gets around here. All sorts of nooks and crannies down at the bottom - things get lost in there all the time.

[ He shrugs, slipping back under the water without much in the way of warning. It might seem like he just decided to end the conversation, except a moment later he bursts back up from the water's surface to more or less invite himself onto her raft, landing solidly and splashing water everywhere in the process. Now, if she hadn't already assumed as much, she can confirm it for real - he's a merman, sharklike from the waist down. ]

Lucky for you, I don't really feel like capsizing your little dinghy.