Deep Cold Ocean biome in Minecraft
The Deep Cold Ocean is the Cold Ocean with a much lower floor: dark blue water, tall seagrass and kelp over gravel, cod and salmon, and still no dolphins. It is one of the four biomes that can hold an ocean monument, which makes it a good spot for an underwater base powered by a conduit.
/execute in minecraft:overworld run tp @s 800 82 -864 0 18Climate
- Dimension
- Overworld
- Temperature
- 0.5
- Downfall
- 0.5
- Weather
- Rain
How to find a Deep Cold Ocean
/locate biome minecraft:deep_cold_oceanMap by Chunkbase, shown as a companion to this guide. Without your seed, it shows an example world. Results depend on the edition and version you pick.
Deep Cold Ocean in numbers
- Share of the world
- 2.4%of the Overworld surface
- Rarity rank
- 40 / 521 = the rarest
- Distance from spawn
- ~1,430 blocksaverage, 1,000 worlds
- Within 1,000 blocks
- 36%of worlds
Cold Ocean78.3%Deep Ocean12.6%
Deep Frozen Ocean6.6%
// 1,000 random seeds, normal world. Java 26.2 world generation computed with cubiomes, plus the 26.3 Dappled Forest rule. Estimates, not exact 26.3 values.
/execute in minecraft:overworld run tp @s 800 48 -864 180 12Mobs in the Deep Cold Ocean
Structures in the Deep Cold Ocean
What makes it different
Everything you know from the Cold Ocean is here, only deeper. Salmon and cod share the water, kelp grows from the gravel and the seagrass is mostly Tall Seagrass. Dolphins still don't spawn. Because it lies between temperate and frozen seas, a Frozen Ocean or a snowy coast is often not far away.
The floor holds stone brick ocean ruins and shipwrecks, and this is one of the four deep biomes where an Ocean Monument can generate. With no dolphins to guide you, use the command above or the seed map to find them.
Building a conduit base
A Conduit lets you live underwater, and the deep cold sea supplies nearly everything it needs. Craft it from a Heart of the Sea, found in buried treasure, surrounded by eight Nautilus Shells. The Nautiluses that swim here drop them. For the heart, open the map chest of a shipwreck: it always holds a treasure map that leads to a buried chest on a nearby beach.
The conduit needs a frame of Prismarine blocks around it: prismarine, prismarine bricks, dark prismarine or sea lanterns. A monument is full of them. The bigger the frame, the wider the area it covers. Once the frame is big enough, the conduit gives Conduit Power to players in the water nearby: you breathe, see clearly and mine faster underwater. With a complete frame, it also attacks hostile mobs that come close, which keeps Drowned away from your base.
✓ Checked in Java Edition 26.3 · updated 1 November 2026
Deep Cold Ocean — FAQ
How do I know I'm in a Deep Cold Ocean and not a Cold Ocean?
Open the debug screen with F3: it shows the biome you are in. Underwater, the deep version has a lower floor and mostly tall seagrass.
Where do I get nautilus shells for a conduit?
Nautiluses drop them, and they spawn in every ocean, this one included. Drowned sometimes carry one in their off hand too.
Which mobs spawn in the Deep Cold Ocean?
Spider, Skeleton, Creeper, Slime, Zombie, Enderman, Zombie Villager, Witch, Drowned, Bat, Squid, Nautilus, Glow Squid, Cod and Salmon.
Which structures generate in the Deep Cold Ocean?
Mineshaft, Ocean Monument, Ocean Ruins, Ruined Portal, Shipwreck, Stronghold and Trial Chambers.
How do you find the Deep Cold Ocean?
With cheats on, /locate biome minecraft:deep_cold_ocean gives the coordinates of the nearest one. Without cheats, a seed map of your world shows where it is.
