I was looking at some older maps and a question came to mind because I noticed on one that the angler wouldn't spawn. What does it take to actually make the ocean biome. I know it is by default the outside edge of the world, the wiki states that. But on this map (Isle of Voices) they put a large fishing tank on the end of the world, no sand. I can catch ocean fish, but the angler never spawns, even if I extend the fish tank to the edge of the world. Is there a sand requirement?