Oooh, what if they have to go "land side" to mate? And the resulting child has to spend the first couple of years on land, too? And, and sometimes they lose track of the kid or the kid goes too far from the water, and grows up without a clue as to where he should be, and goes on to win this quirky karaoke contest, and the resulting single gets played everywhere, including cruise ships, meaning the sea population clues in eventually, especially the Lost Boy's preplanned mate who's all, like, holy kelp, my boy's on the radio! and then, like, holy CRAP, my boy's ALIVE! and has to go to LA to drag Kris' silly ass back into the water.