Dib explaining some of the thing he learned/figured out while at the beach.
He has gills on his ribs and there’s no issues from the when he’s breathing air. But they do feeling kinda sensitive when he lays on them. He’s glad that he was wearing shirt while on the beach, because wasn’t sure he wanted to know what it would be like to get sand in them.
And he can’t just dive straight underwater without a problem. He has to breathe out before going under or out of the water. He isn’t quite sure how to describe what happens when he doesn’t other than gagging on whatever is in his system at the time.
(Basically, if he doesn’t force out whatever is in his lungs at the time, he body gets confused on what he’s supposed to be breathing at the time. It’s kind of like when you get water up your nose.)