"It sounds kind of like you're meant to be able to live both places, if you want to. Since you have the ability to change like that." Even if it's out of his control, his body still functions that way, changing from human to sea creature depending on if he's wet or dry. And it's incredible really, that he can do such a thing. There's a genuine awe in Rose's voice—

"That's really amazing, actually. That you can do such a thing. I wish I could. ...Actually, I bet a lot of people would like that. You're really special, Luca."

If people could learn not to fear something that's "different".... they could see how special it really is. Like her daughter, and like Alessa had been.