Minecraft wiki entry for Island_survival, associated text: When on small island in a deep ocean, ironically, you don't have to worry much about monsters if the island is small enough to be within the minimum 24-block spawning range. Drowned may spawn in the ocean but they typically don't emerge from the water in a deep ocean. This is the situation with the "Ocean Monuments Ahead" seed in the Bedrock Edition seed picker. With larger islands, it is a good idea to light it up as soon as possible to prevent monsters from spawning on it.