"Yeah, we should go right now! I don't know how we'd know by seeing it, though... Maybe we'll just know." Not really knowing though doesn't diminish his enthusiasm in the slightest, and in fact the thought of adventure and exploring is enough to excite him more. Sure, he could just look around on his own, but now it's like a quest or something and that makes it more fun.

"I dunno where to start looking." He looks around again, seeing if there's somewhere that looks cool to start - maybe a sea cave or something? He doesn't know where fish really live, not specifically, and so he just ends up spinning around slowly to see what he can see.