Minecraft wiki entry for Drowned, associated text: In Bedrock Edition drowned spawn in groups of 2–4 inside flowing water or source water of any depth, but they spawn at higher rates in water that is 2 blocks or taller.[more information needed] They spawn only on the surface that is on the highest spawnable block at any given X, Z coordinate. They count toward the monster population control cap and also have their own density caps of 5 in oceans and 2 in rivers.