Minecraft wiki entry for Best_biomes_for_homes, associated text: Oceans are appealing for players to live in. Oceans spawn in temperature variants, such as warm, lukewarm, normal (basic ocean biome), cold, and frozen. Each one of these (except warm oceans) also have a "deep" variant, allowing for larger underwater structures. All ocean types can contain underwater ruins and shipwrecks, and all deep variants can contain ocean monuments.