Whiteley Foster had the most charming idea for this picture, and I'm gonna partially quote them:
A.Z. Fell the biologist is at sea with a bunch of smelly fisherman, ferrying him around from island to island, because he’s trying to find this illusive merperson that Professor Gabriel and all those other stuck up scientists told him didn’t exist. And he finds Croalei, they fall in love, and he goes back to the laboratory like, "You were right, I’m a fool for thinking I could find them... by the way I quit” and goes to spend the rest of his life on said island.
And when he runs out of books to read to them, he just starts writing his own.
I had originally intended to do black lava rock, like the beaches here, but I chickened out. I should have, it would have looked really cool, but the white rock is pretty nice too. And there are our little bird friends, and some fishies, and Aziraphale is probably reading poems by Mirabai.