Dej says that he wanted this song to sound like "falling through the Pacific really slowly." While he's out there I'm sure he's hoping to meet some eligible mermaids.
Sadly, Tinder for mermaids doesn't exist yet. How would they swipe even? They'd obviously also need one of those waterproof Samsungs.
Logistically it's a nightmare. But Dej knows that, and that's why hes tried to sum up how it feels in a four minute song.