Minecraft:Cold Ocean Ruins

Template:Infobox structure Cold ocean ruins are variants of Minecraft:ocean ruins. They are underwater Minecraft:structures primarily composed of Minecraft:stone bricks. They are found in Minecraft:ocean biomes and rarely on Minecraft:beaches, and are inhabited by Minecraft:drowned and sometimes Minecraft:zombie nautiluses alongside them. They contain Minecraft:chests and Minecraft:suspicious gravel that contain a variety of Minecraft:loot, most notably buried Minecraft:treasure maps, exclusive Minecraft:pottery sherds, Minecraft:nautilus armor and Minecraft:emeralds.

Generation

Cold ocean ruins generate in normal, cold, and frozen ocean biomes or in their deep variants. They are composed of stone materials and contain some suspicious gravel blocks that can be excavated using a brush.

Ocean ruins may at times be at least partially buried, including with their airspaces. During generation, all air blocks and structure blocks act as structure voids. This means that their associated suspicious blocks are also located under layers of usual gravel, and even stone.

Suspicious gravel randomly replaces normal gravel during generation, and are not part of the structure definition.

Although most ocean ruins generate underwater, they sometimes generate on land, bordering a beach or another seaside biome. 30% of ocean ruins generate as large ocean ruins; the other 70% generate as small ruins. If the ocean ruin is large, there is a 90% chance for 4-8 (inclusive) small ocean ruins to generate around it in a cluster. The "brick" variant of the chosen structure type generates with a structure integrity of 0.9 if large and 0.8 if small. The "cracked" variant generates with a structure integrity of 0.7 and the "mossy" variant generates with a structure integrity of 0.5, both regardless of size. Reduced structure integrity may also remove drowned and zombie nautiluses from the structures.

Structure

Template:Main The shape and size of cold ocean ruins varies greatly, and they often generate together in groups to create ruined villages.

All but two of the structures contain a loot Minecraft:chest with loot inside. The chest contains loot for specifically either a small or large sized ocean ruin structure and may be buried under blocks such as Minecraft:gravel.

Cold ocean ruins are primarily composed of Minecraft:stone bricks, Minecraft:gravel, and Minecraft:suspicious gravel, and they also contain Minecraft:prismarine, Minecraft:sand, Minecraft:magma blocks, Minecraft:sea lanterns, Minecraft:polished granite, Minecraft:glazed terracotta, Minecraft:bricks, Minecraft:planks, Minecraft:cobblestone, Minecraft:mossy cobblestone, Minecraft:stone brick stairs, Minecraft:obsidian, or a Minecraft:chest with loot in it.

Natural cold ocean ruins generate following the rules above and may not exactly match the stored structures.

The structures below are located in the folder Minecraft:client.jar/data/minecraft/structures/underwater_ruin. The following is a complete table of the structures with their filenames, descriptions and what they consist of.

Each Template:BlockLink indicates either a chest with random loot or the spawn location of a drowned/zombie nautilus Minecraft:mob.

Mobs

File:Zombie nautilus jockey in ocean ruins.png

A zombie nautilus jockey near a cold ocean ruin.

File:DrownedFace.png	Template:Animate
Minecraft:Drowned	Minecraft:Zombie Nautilus

Upon world generation, many of the structures spawn with Minecraft:drowned (usually one or two, though a few structures have three or four). These drowned are persistent, and do not despawn. Adult drowned wielding tridents may also also spawn riding a Minecraft:zombie nautilus as a zombie nautilus jockey.

Zombie nautiluses spawned from ruins are also persistent and will even spawn on Minecraft:Peaceful difficulty, despite being Minecraft:monsters, as the mobs spawned from ocean ruins count as part of the structure and ignore conventional spawning mechanics, leaving the zombie nautilus spawning on Peaceful by itself.<ref>Template:Bug</ref>

Cold ocean ruins

Structure name	Description	Consists of	Images
underwater_ruin/big_brick_1 underwater_ruin/big_cracked_1 underwater_ruin/big_mossy_1	A chunk-sized structure with a mostly gravel floor and a large, multidimensional arch. These 3 generate as an integrated whole. 1-2 Drowned always generate here.	215–239 Template:BlockLink 97 in total Template:BlockLink, Template:BlockLink, Template:BlockLink 8 Template:BlockLink 4–5 Template:BlockLink 3–4 Template:BlockLink 1 Template:BlockLink 1 Template:BlockLink (random loot) 1–2 Template:EntityLink Template:EntityLink - Has a chance of spawning alongside a trident-wielding Drowned	File:Ruin Big Brick 1.png
underwater_ruin/big_brick_2 underwater_ruin/big_cracked_2 underwater_ruin/big_mossy_2	A chunk-sized structure consisting of two connected rooms, one taller than the other. These 3 generate as an integrated whole. 1-2 Drowned always generate here.	209 in total Template:BlockLink, Template:BlockLink, Template:BlockLink 192–206 Template:BlockLink 39 Template:BlockLink 15 Template:BlockLink 5–7 Template:BlockLink 4 Template:BlockLink 2 Template:BlockLink 1–5 Template:BlockLink 1 Template:BlockLink (random loot) 1–2 Template:EntityLink Template:EntityLink - Has a chance of spawning alongside a trident-wielding Drowned	File:Ruin Big Brick 2.png
underwater_ruin/big_brick_3 underwater_ruin/big_cracked_3 underwater_ruin/big_mossy_3	A chunk-sized structure consisting of two large unconnected rooms, one much taller than the other and having an open top. These 3 generate as an integrated whole. 1-3 Drowned always generate here.	301 in total Template:BlockLink, Template:BlockLink, Template:BlockLink 205–217 Template:BlockLink 55 Template:BlockLink 17 Template:BlockLink 10 Template:BlockLink 2–8 Template:BlockLink 2 Template:BlockLink 1–2 Template:BlockLink 1 Template:BlockLink (random loot) 1–3 Template:EntityLink Template:EntityLink - Has a chance of spawning alongside a trident-wielding Drowned	File:Ruin Big Brick 3.png
underwater_ruin/big_brick_8 underwater_ruin/big_cracked_8 underwater_ruin/big_mossy_8	A chunk-sized structure with not much height, looks similar to a floorplan of a large building. Remnants of Minecraft:wooden floors are present. These 3 generate as an integrated whole. 1-2 Drowned always generate here.	210–224 Template:BlockLink 88 in total Template:BlockLink, Template:BlockLink, Template:BlockLink 8–12 Template:BlockLink 9 Template:BlockLink 8 Template:BlockLink 3 Template:BlockLink 1 Template:BlockLink (random loot) 1–2 Template:EntityLink Template:EntityLink - Has a chance of spawning alongside a trident-wielding Drowned	File:Ruin Big Brick 8.png
underwater_ruin/brick_1 underwater_ruin/cracked_1 underwater_ruin/mossy_1	A small building without a roof. These 3 generate as an integrated whole. A Drowned has a chance to generate here.	36–38 Template:BlockLink 32–37 in total Template:BlockLink, Template:BlockLink, Template:BlockLink 17–19 Template:BlockLink 1 Template:BlockLink 0–1 Template:BlockLink 0–1 Template:BlockLink (random loot) 0–1 Template:EntityLink Template:EntityLink - Has a chance of spawning alongside a trident-wielding Drowned	File:Ruin Brick 1.png
underwater_ruin/brick_2 underwater_ruin/cracked_2 underwater_ruin/mossy_2	A small structure with not much height. Consists of randomly placed Minecraft:stone bricks and Minecraft:mossy cobblestone. These 3 generate as an integrated whole. 1-2 Drowned have a chance to generate here.	30–39 Template:BlockLink 9 in total Template:BlockLink, Template:BlockLink, Template:BlockLink 6–10 Template:BlockLink 2 Template:BlockLink 1 Template:BlockLink (random loot) 0–2 Template:EntityLink Template:EntityLink - Has a chance of spawning alongside a trident-wielding Drowned	File:Ruin Brick 2.png
underwater_ruin/brick_3 underwater_ruin/cracked_3 underwater_ruin/mossy_3	A small structure featuring a stone brick arch. These 3 generate as an integrated whole.	30–35 Template:BlockLink 20–21 in total Template:BlockLink, Template:BlockLink, Template:BlockLink 2 Template:BlockLink 1–2 Template:BlockLink 1–2 Template:BlockLink 1–5 Template:BlockLink 1 Template:BlockLink 0–1 Template:BlockLink 1 Template:BlockLink (random loot)	File:Ruin Brick 3.png
underwater_ruin/brick_4 underwater_ruin/cracked_4 underwater_ruin/mossy_4	A small structure featuring a small, domed building. These 3 generate as an integrated whole. 1-2 Drowned have a chance to generate here.	70–71 in total Template:BlockLink, Template:BlockLink, Template:BlockLink 27–35 Template:BlockLink 3–6 Template:BlockLink 1–6 Template:BlockLink 0–4 Template:BlockLink 0–2 Template:BlockLink 1 Template:BlockLink (random loot) 0–2 Template:EntityLink Template:EntityLink - Has a chance of spawning alongside a trident-wielding Drowned	File:Ruin Brick 4.png
underwater_ruin/brick_5 underwater_ruin/cracked_5 underwater_ruin/mossy_5	A small structure with a small, cuboid building. These 3 generate as an integrated whole. A Drowned has a chance to generate here.	37–39 Template:BlockLink 35 in total Template:BlockLink, Template:BlockLink, Template:BlockLink 9 Template:BlockLink 8 Template:BlockLink 1 Template:BlockLink (random loot) 0–1 Template:EntityLink Template:EntityLink - Has a chance of spawning alongside a trident-wielding Drowned	File:Ruin Brick 5.png
underwater_ruin/brick_6 underwater_ruin/cracked_6 underwater_ruin/mossy_6	A small structure that looks similar to a castle tower. These 3 generate as an integrated whole. 1-4 Drowned have a chance to generate here.	58 in total Template:BlockLink, Template:BlockLink, Template:BlockLink 41–43 Template:BlockLink 24 Template:BlockLink 2 Template:BlockLink 2 Template:BlockLink 0–3 Template:BlockLink 0–1 Template:BlockLink 1 Template:BlockLink (random loot) 0–4 Template:EntityLink Template:EntityLink - Has a chance of spawning alongside a trident-wielding Drowned	File:Ruin Brick 6.png
underwater_ruin/brick_7 underwater_ruin/cracked_7 underwater_ruin/mossy_7	A small structure that resembles brick_5/cracked_5/mossy_5, although with a slightly taller roof. These 3 generate as an integrated whole. A Drowned has a chance to generate here.	40 in total Template:BlockLink, Template:BlockLink, Template:BlockLink 35 Template:BlockLink 6 Template:BlockLink 4 Template:BlockLink 1 Template:BlockLink 1 Template:BlockLink 1 Template:BlockLink (random loot) 0–1 Template:EntityLink Template:EntityLink - Has a chance of spawning alongside a trident-wielding Drowned	File:Ruin Brick 7.png
underwater_ruin/brick_8 underwater_ruin/cracked_8 underwater_ruin/mossy_8	A small structure that looks similar to an igloo, although made of stone materials. These 3 generate as an integrated whole. A Drowned has a chance to generate here.	41 in total Template:BlockLink, Template:BlockLink, Template:BlockLink 25–28 Template:BlockLink 11 Template:BlockLink 3–5 Template:BlockLink 1–2 Template:BlockLink 0–1 Template:BlockLink 1 Template:BlockLink (random loot) 0–1 Template:EntityLink Template:EntityLink - Has a chance of spawning alongside a trident-wielding Drowned	File:Ruin Brick 8.png

Loot

Data values

Template:El: Template:ID table Template:ID table Template:ID table

Template:El: Template:ID table

History

File:Turtle first screenshot.jpg

The first official image of underwater ruins.

File:Turtle Structure.png

The same image, brightened for clarity.

Issues

Issues relating to "Ocean Ruins" are maintained on the Minecraft:bug tracker. Issues should be reported and viewed there.

Trivia

File:Land ruin.png

An ocean ruin Template:In that generated completely on land. The water block above it that has not been updated.

File:Land ruin Java.png

An ocean ruin Template:In that also generated completely on land. The loot chest is not waterlogged and does not have a water block on top of it.

• Template:IN, ocean ruins generate with approximately equal spacing in the X and Z directions.
• Template:IN, the loot chest of ocean ruins generates with a water block above it.<ref>Template:Bug</ref> This can be seen in the first image. Template:IN, this is not the case, according to the second picture.<ref>Template:Bug</ref>

Gallery

• A cold underwater ruins that generated with an Ocean Monument, revealing the treasure chamber.
  Cold ocean ruins that generated with an Minecraft:Ocean Monument, revealing the treasure chamber.
• A set of two loot chests in a cold ocean ruins.
  A set of two loot chests in a cold ocean ruins.
• A cold ocean ruins.
  A cold ocean ruins.
• A Minecraft:zombie nautilus jockey that spawned near a cold ocean ruins.
  A Minecraft:zombie nautilus jockey that spawned near a cold ocean ruins.
• Bubble columns near a cold ocean ruins.
  Bubble columns near a cold ocean ruins.
• Chests in a cold ocean ruins.
  Chests in a cold ocean ruins.
• Cold ocean ruins near a ravine.
  Cold ocean ruins near a ravine.
• Cold ocean ruins that generated almost on land, with Minecraft:drowned.
  Cold ocean ruins that generated almost on land, with Minecraft:drowned.
• Cold ocean ruins on land, with some drowned catching fire from the sun.
  Cold ocean ruins on land, with some drowned catching fire from the sun.
• Cold ocean ruins generated with a Minecraft:shipwreck.
  Cold ocean ruins generated with a Minecraft:shipwreck.
• Cold ocean ruins in a patch of Minecraft:ice.
  Cold ocean ruins in a patch of Minecraft:ice.
• Cold ocean ruins.
  Cold ocean ruins.

External links

"Building Blocks: Ocean Ruins" by Minecraft:Duncan Geere – Minecraft.net, August 14, 2025.