That gets a weird look.

"Uh, I don't know?" Fertility statue? What? "Maybe you're more an expert on that kind of thing..." Weirdo.

That said, Manabu leads the way to the top deck of the ship he's not fully scoured yet, pointing out where the stairs to the lower decks are, giving the stronger swimmer the leeway to head out first, while he himself floats to look around and make sure there's no spooky sea beasts scoping them out.