Lukewarm Ocean is a moderately warm ocean biome that occupies intermediate temperature zones across the Minecraft world. It commonly generates alongside jungles, savannas, and windswept savannas, though it can also appear beside plains and forests. The Lukewarm Ocean typically forms as a shallower ocean body adjacent to coastal biomes, and it transitions into deep lukewarm ocean variants where the terrain drops away. Depending on nearby temperatures, it may border warm oceans on one side and regular oceans on the other.
The seafloor of the Lukewarm Ocean consists mainly of sand, with scattered patches of dirt, gravel, and clay appearing in shallower sections. Ocean ruins that generate here, as well as in warm oceans, are constructed from sandstone blocks rather than the stone used in colder ocean ruins. Compared to colder ocean biomes, the Lukewarm Ocean features a greater abundance of seagrass and relatively little kelp. Occasional small islands dot the surface, covered with grass blocks and typical surface vegetation.
The Lukewarm Ocean supports a varied range of aquatic creatures. Tropical fish and pufferfish are characteristic inhabitants, while cod also populate these waters, joined by salmon in Bedrock Edition. Dolphins, squids, glow squids, and nautiluses are all present. On the hostile side, standard mobs such as zombies, skeletons, creepers, and drowned spawn here, and drowned can occasionally be found riding zombie nautiluses, adding an unusual encounter to underwater exploration.