[It's a very valid thing to ask please don't drown the people who breathe air, even when you yourself can breathe underwater. Really, it should be basic submarine etiquette.

Fern, at little embarrassed, rubs the back of his head.]

Y - yeah! Don't worry, I'm not gonna have another freak out like that again. I'll be chill, the ocean isn't that scary anymore.

[He's pretty much over his phobia, so it should be fine.]