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Ocean Ruins

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Ocean Ruins
Underwater ruin cold.pngUnderwater ruin warm.png
Biomes
Consists of

See Structure

Can generate in
existing chunks

No

Ocean ruins or underwater ruins are oceanic structures primarily composed of stone bricks or sandstone. They come in many different sizes varying from large villages to single ruined huts. They are rare, and have cold and warm variants.

Generation[edit]

Cold ocean ruins generate in normal, cold, and frozen ocean biomes, as well as their deep variants. They are composed of stone materials.

Warm ocean ruins generate in warm, lukewarm, and deep lukewarm ocean biomes, and are composed of sandstone and stone materials.

Although most ocean ruins generate underwater, they sometimes generate on land.

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. If the ocean ruin is warm, large ocean ruins generate with a structure integrity of 0.9 and small ocean ruins generate with a structure integrity of 0.8. If the ocean ruin is cold, 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 loot chests from the structures.[verify]

During generation, all air blocks and structure blocks act as structure voids.

Structure[edit]

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

All but two of the structures contain a loot chest with loot inside. The chest contains loot for specifically either a small or large sized ocean ruin structure and may be buried by some sort of material such as gravel and sand.

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

Many of the structures spawn with drowned (usually 1–2, though a few structures have 3 or 4).

Note that natural ocean ruins generate following the rules above and may not exactly match the stored structures.

Each structure below is located in the folder client.jar/data/minecraft/structures/underwater_ruin. The following is an incomplete table of the structures with their filenames, descriptions and what they consist of:

Structure name Description Consists of Images
underwater_ruin/big_brick_1 A chunk-sized structure with a mostly gravel floor and a large, multidimensional arch. These 3 generate combined with each other.

239 Gravel
97 Stone Bricks
8 Chiseled Stone Bricks
4 Prismarine
4 Magma Block
1 Sand
1 Chest (random loot)
2 Drowned

Big cracked 1.png
underwater_ruin/big_cracked_1

215 Gravel
97 Cracked Stone Bricks
8 Chiseled Stone Bricks
5 Prismarine
4 Magma Block
2 Sea Lantern
1 Sand
1 Chest (random loot)
1 Drowned

underwater_ruin/big_mossy_1

226 Gravel
97 Mossy Stone Bricks
8 Chiseled Stone Bricks
4 Prismarine
3 Magma Block
2 Sea Lantern
1 Sand
1 Chest (random loot)
1 Drowned

underwater_ruin/big_brick_2 A chunk-sized structure consisting of two connected rooms, one taller than the other. These 3 generate combined with each other.

209 Stone Bricks
192 Gravel
39 Chiseled Stone Bricks
15 Polished Granite
6 Prismarine
4 Purple Glazed Terracotta
2 Sea Lantern
1 Magma Block
1 Chest (random loot)
1 Drowned

Big mossy 2.png
underwater_ruin/big_cracked_2

209 Cracked Stone Bricks
206 Gravel
39 Chiseled Stone Bricks
15 Polished Granite
5 Magma Block
5 Prismarine
4 Purple Glazed Terracotta
2 Sea Lantern
1 Chest (random loot)
2 Drowned

underwater_ruin/big_mossy_2

209 Mossy Stone Bricks
199 Gravel
39 Chiseled Stone Bricks
15 Polished Granite
7 Prismarine
4 Purple Glazed Terracotta
3 Magma Block
2 Sea Lantern
1 Chest (random loot)
2 Drowned

underwater_ruin/big_brick_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 combined with each other.

301 Stone Bricks
205 Gravel
55 Chiseled Stone Bricks
17 Polished Granite
10 Bricks
6 Sand
2 Magma Block
2 Sea Lantern
1 Chest (random loot)
2 Drowned

Big ruin 3.png
underwater_ruin/big_cracked_3

301 Cracked Stone Bricks
217 Gravel
55 Chiseled Stone Bricks
17 Polished Granite
10 Bricks
2 Sand
2 Sea Lantern
1 Magma Block
1 Chest (random loot)
3 Drowned

underwater_ruin/big_mossy_3

301 Mossy Stone Bricks
208 Gravel
55 Chiseled Stone Bricks
17 Polished Granite
10 Bricks
8 Sand
2 Magma Block
2 Sea Lantern
1 Chest (random loot)
1 Drowned

underwater_ruin/big_brick_8 A chunk-sized structure with little height, looks similar to a floorplan of a large building. Remnants of wood floors are present. These 3 generate combined with each other.

210 Gravel
88 Stone Bricks
12 Sand
9 Spruce Planks
8 Dark Oak Planks
3 Magma Block
1 Chest (random loot)
2 Drowned

Big ruin 8.png
underwater_ruin/big_cracked_8

224 Gravel
88 Cracked Stone Bricks
9 Spruce Planks
8 Dark Oak Planks
8 Sand
3 Magma Block
1 Chest (random loot)
1 Drowned

underwater_ruin/big_mossy_8

221 Gravel
88 Mossy Stone Bricks
11 Sand
9 Spruce Planks
8 Dark Oak Planks
3 Magma Block
1 Chest (random loot)
2 Drowned

underwater_ruin/big_warm_4 A chunk-sized structure featuring a large sandstone arch.

220 Sand
152 Cut Sandstone
24 Polished Granite
18 Chiseled Sandstone
4 Sea Lantern
3 Magma Block
1 Chest (random loot)
2 Drowned

Big warm ruin 4.png
underwater_ruin/big_warm_5 A chunk-sized structure with a tall tower in the center. It looks similar to a fountain.

222 Sand
43 Cut Sandstone
12 Sandstone
8 Polished Granite
5 Magma Block
4 Polished Diorite
2 Sea Lantern
1 Chest (random loot)
4 Drowned

Big warm 5.png
underwater_ruin/big_warm_6 A chunk-sized structure featuring 4 sandstone arches.

219 Sand
129 Cut Sandstone
4 Chiseled Sandstone
4 Magma Block
2 Sandstone
2 Sea Lantern
1 Chest (random loot)
2 Drowned

Big warm 6.png
underwater_ruin/big_warm_7 A chunk-sized structure with an open sandstone dome.

202 Sand
100 Cut Sandstone
24 Gravel
8 Chiseled Sandstone
4 Polished Granite
2 Magma Block
2 Sandstone
1 Sea Lantern
1 Chest (random loot)
2 Drowned

Big warm 7.png
underwater_ruin/brick_1 A small building without a roof. These 3 generate combined with each other.

37 Stone Bricks
36 Gravel
17 Mossy Cobblestone
1 Sea Lantern
1 Chest (random loot)

Ruin 1.png
underwater_ruin/cracked_1

36 Gravel
35 Cracked Stone Bricks
17 Mossy Cobblestone
1 Sea Lantern
1 Chest (random loot)

underwater_ruin/mossy_1

38 Gravel
32 Mossy Stone Bricks
19 Mossy Cobblestone
1 Magma Block
1 Sea Lantern
1 Drowned

underwater_ruin/ brick_2 A small structure with not much height. Consists of randomly placed stone bricks and mossy cobblestone. These 3 generate combined with each other.

39 Gravel
9 Stone Bricks
8 Mossy Cobblestone
2 Magma Block
1 Chest (random loot)
2 Drowned

Brick 2.png
underwater_ruin/cracked_2

30 Gravel
9 Cracked Stone Bricks
6 Mossy Cobblestone
2 Magma Block
1 Chest (random loot)

underwater_ruin/mossy_2

37 Gravel
10 Mossy Cobblestone
9 Mossy Stone Bricks
2 Magma Block
1 Chest (random loot)

underwater_ruin/brick_3 A small structure featuring a stone brick arch. These 3 generate combined with each other.

30 Gravel
20 Stone Bricks
2 Chiseled Stone Bricks
2 Magma Block
2 Stone Brick Stairs
1 Cobblestone
1 Sand
1 Chest (random loot)

Ruin 3.png
underwater_ruin/cracked_3

35 Gravel
20 Cracked Stone Bricks
5 Sand
2 Stone Brick Stairs
1 Chiseled Stone Bricks
1 Cobblestone
1 Magma Block
1 Obsidian
1 Chest (random loot)

underwater_ruin/mossy_3

30 Gravel
21 Mossy Stone Bricks
4 Sand
2 Stone Brick Stairs
1 Chiseled Stone Bricks
1 Cobblestone
1 Magma Block
1 Chest (random loot)

underwater_ruin/brick_4 A small structure featuring a small, domed building. These 3 generate combined with each other.

71 Stone Bricks
30 Gravel
4 Dark Oak Planks
3 Sand
2 Spruce Planks
1 Magma Block
1 Chest (random loot)
2 Drowned

Ruin 4.png
underwater_ruin/cracked_4

71 Cracked Stone Bricks
35 Gravel
4 Sand
1 Dark Oak Planks
1 Stone Bricks
1 Chest (random loot)

underwater_ruin/mossy_4

70 Mossy Stone Bricks
27 Gravel
6 Dark Oak Planks
6 Sand
4 Magma Block
2 Spruce Planks
1 Chest (random loot)

underwater_ruin/brick_5 A small structure with a small, cuboid building. These 3 generate combined with each other.

39 Gravel
35 Stone Bricks
9 Polished Granite
8 Chiseled Stone Bricks
1 Chest (random loot)

Cracked 5.png
underwater_ruin/cracked_5

37 Gravel
35 Cracked Stone Bricks
9 Polished Granite
8 Chiseled Stone Bricks
1 Chest (random loot)

underwater_ruin/mossy_5

39 Gravel
35 Mossy Stone Bricks
9 Polished Granite
8 Chiseled Stone Bricks
1 Chest (random loot)
1 Drowned

underwater_ruin/brick_6 A small structure that looks similar to a castle tower. These 3 generate combined with each other.

58 Stone Bricks
41 Gravel
24 Stone Brick Stairs
3 Mossy Cobblestone
2 Chiseled Stone Bricks
2 Polished Granite
1 Magma Block
1 Chest (random loot)
4 Drowned

Mossy 6.png
underwater_ruin/cracked_6

58 Cracked Stone Bricks
41 Gravel
24 Stone Brick Stairs
2 Chiseled Stone Bricks
2 Polished Granite
1 Chest (random loot)

underwater_ruin/mossy_6

58 Mossy Stone Bricks
43 Gravel
24 Stone Brick Stairs
3 Mossy Cobblestone
2 Chiseled Stone Bricks
2 Polished Granite
1 Magma Block
1 Chest (random loot)
1 Drowned

underwater_ruin/brick_7 A small structure that resembles brick_5, cracked_5 and mossy_5, although with a slightly taller roof. These 3 generate combined with each other.

40 Stone Bricks
35 Gravel
6 Mossy Cobblestone
4 Chiseled Stone Bricks
1 Magma Block
1 Polished Granite
1 Chest (random loot)

Brick 7.png
underwater_ruin/cracked_7

40 Cracked Stone Bricks
35 Gravel
6 Mossy Cobblestone
4 Chiseled Stone Bricks
1 Magma Block
1 Polished Granite
1 Chest (random loot)
1 Drowned

underwater_ruin/mossy_7

40 Mossy Stone Bricks
35 Gravel
6 Mossy Cobblestone
4 Chiseled Stone Bricks
1 Magma Block
1 Polished Granite
1 Chest (random loot)
1 Drowned

underwater_ruin/brick_8 A small structure that looks similar to an igloo, although made of stone materials. These 3 generate combined with each other.

41 Stone Bricks
25 Gravel
11 Chiseled Stone Bricks
5 Dark Oak Planks
2 Magma Block
1 Chest (random loot)
1 Drowned

Ruin 8.png
underwater_ruin/cracked_8

41 Cracked Stone Bricks
28 Gravel
11 Chiseled Stone Bricks
5 Dark Oak Planks
1 Magma Block
1 Chest (random loot)

underwater_ruin/mossy_8

41 Mossy Stone Bricks
27 Gravel
11 Chiseled Stone Bricks
3 Dark Oak Planks
1 Magma Block
1 Obsidian
1 Chest (random loot)
1 Drowned

underwater_ruin/warm_1 A small structure with an open dome. Looks like a smaller version of big_warm_7.

75 Cut Sandstone
47 Sand
7 Polished Granite
1 Chest (random loot)

Warm 1.png
underwater_ruin/warm_2 A small hut with a large opening in the front.

42 Sand
36 Cut Sandstone
2 Light Blue Terracotta
2 Polished Granite
1 Chest (random loot)
2 Drowned

Warm ruin 2.png
underwater_ruin/warm_3 A small hut that has an entrance on all sides.

36 Sand
24 Cut Sandstone
13 Polished Granite
2 Magma Block
1 Chest (random loot)
1 Drowned

Warm 3.png
underwater_ruin/warm_4 A small structure featuring two small arches.

42 Sand
28 Cut Sandstone
10 Sandstone Stairs
2 Chiseled Sandstone
1 Magma Block
1 Chest (random loot)
1 Drowned

Warm 4.png
underwater_ruin/warm_5 A small structure that is essentially a roof with multiple supports.

37 Sand
34 Cut Sandstone
1 Chest (random loot)
1 Drowned

Warm ruin 5.png
underwater_ruin/warm_6 A small hut that looks similar to the ruin5 series, although made of sand materials. It is filled with sand and the entrance is blocked off.

48 Sand
39 Cut Sandstone
4 Light Blue Terracotta
1 Magma Block
1 Chest (random loot)

Warm 6.png
underwater_ruin/warm_7 A small structure that looks similar to the ruin2 series, although made of sand materials.

34 Sand
6 Cut Sandstone
3 Polished Granite
1 Chest (random loot)

Warm ruin 7.png
underwater_ruin/warm_8 A thin wall with multiple "windows". Appears to be a miniature cross section of big_warm_4.

56 Sand
19 Cut Sandstone
5 Magma Block
4 Sandstone Stairs
1 Chest (random loot)
1 Drowned

Warm 8.png

Loot[edit]

In Java Edition each underwater ruin big chest contains items drawn from 2 pools, with the following distribution:

Item Stack Size [A] Weight [B] Chance [C] Avg.
per chest
[D]
Avg. # chests
to search
[E]
2–8× 2–8×
Coal 1–4103181.0%4.0321.2
Wheat 2–3103181.0%4.0321.2
Gold Nugget 1–3103181.0%3.2261.2
Buried Treasure Map 1102343.5%0.4352.3
Enchanted Book[note 1] 152321.7%0.2174.6
Enchanted Fishing Rod[note 1] 152321.7%0.2174.6
Emerald 113114.9%0.1616.7
Leather Tunic 11234.3%0.04323.0
Golden Apple 11234.3%0.04323.0
Golden Helmet 11234.3%0.04323.0

In Bedrock Edition each underwater ruin big chest contains items drawn from 2 pools, with the following distribution:

Item Stack Size [A] Weight [B] Chance [C] Avg.
per chest
[D]
Avg. # chests
to search
[E]
2–8× 2–8×
Coal 1–4103181.0%4.0321.2
Wheat 2–3103181.0%4.0321.2
Gold Nugget 1–3103181.0%3.2261.2
Buried Treasure Map 1102343.5%0.4352.3
Enchanted Book[note 1] 152321.7%0.2174.6
Enchanted Fishing Rod[note 1] 152321.7%0.2174.6
Emerald 113114.9%0.1616.7
Leather Tunic 11234.3%0.04323.0
Golden Apple 11234.3%0.04323.0
Golden Helmet 11234.3%0.04323.0
  1. a b The size of stacks (or for unstackable items, number) of this item on any given roll.
  2. a b The weight of this item relative to other items in the pool.
  3. a b The odds of finding any of this item in a single chest.
  4. a b The number of items expected per chest, averaged over a large number of chests.
  5. a b The average number of chests the player should expect to search to find any of this item.

In Java Edition each underwater ruin small chest contains items drawn from 2 pools, with the following distribution:

Item Stack Size [A] Weight [B] Chance [C] Avg.
per chest
[D]
Avg. # chests
to search
[E]
2–8× 2–8×
Coal 1–4102884.2%4.4641.2
Wheat 2–3102884.2%4.4641.2
Rotten Flesh 152859.6%0.8931.7
Buried Treasure Map 151241.7%0.4172.4
Enchanted Fishing Rod[note 1] 151241.7%0.4172.4
Stone Axe 122830.2%0.3573.3
Emerald 112816.4%0.1796.1
Leather Tunic 11128.3%0.08312.0
Golden Helmet 11128.3%0.08312.0

In Bedrock Edition each underwater ruin small chest contains items drawn from 2 pools, with the following distribution:

Item Stack Size [A] Weight [B] Chance [C] Avg.
per chest
[D]
Avg. # chests
to search
[E]
2–8× 2–8×
Coal 1–4102884.2%4.4641.2
Wheat 2–3102884.2%4.4641.2
Rotten Flesh 152859.6%0.8931.7
Buried Treasure Map 151241.7%0.4172.4
Enchanted Fishing Rod[note 1] 151241.7%0.4172.4
Stone Axe 122830.2%0.3573.3
Emerald 112816.4%0.1796.1
Leather Tunic 11128.3%0.08312.0
Golden Helmet 11128.3%0.08312.0
  1. a b The size of stacks (or for unstackable items, number) of this item on any given roll.
  2. a b The weight of this item relative to other items in the pool.
  3. a b The odds of finding any of this item in a single chest.
  4. a b The number of items expected per chest, averaged over a large number of chests.
  5. a b The average number of chests the player should expect to search to find any of this item.
  1. a b c d e f All enchantments are equally probable, including treasure enchantments (except Soul Speed), and any level of the enchantment is equally probable.

Achievements[edit]

Icon Achievement In-game description Actual requirements (if different) Gamerscore earned Trophy type (PS)
Atlantis?Find an underwater ruin20GSilver

History[edit]

The first official image of underwater ruins.
The same image, brightened for clarity.
Java Edition
December 27, 2017A picture was released on Minecraft.net, which shows a faint underwater ruins structure in the top right corner, more visible when the image is brightened.
February 15, 2018Minecraft's Instagram account posted a video clip showing the underwater ruins that were to be added in the Update Aquatic.
1.1318w09aAdded underwater ruins. They are found commonly.
18w10aBuried treasure explorer maps now generate in the chests of underwater ruins.
18w16aDrowned now spawn in underwater ruins.
1.1620w06aUnderwater Ruins are much less common.
Bedrock Edition
1.4.0beta 1.2.20.1Added underwater ruins.
Legacy Console Edition
TU681.76Patch 38Added underwater ruins.
Education Edition
1.4.0Added underwater ruins.

Issues[edit]

Issues relating to "Ocean Ruins" are maintained on the bug tracker. Report issues there.

Trivia[edit]

An ocean ruin in Bedrock Edition that generated completely on land. Note the waterlogged chest and the water block above it that has not been updated.
An ocean ruin in Java Edition that also generated completely on land. Note that the loot chest is not waterlogged and doesn't have a water block on it.
  • In the Bedrock Edition, the loot chest of ocean ruins generates waterlogged as well as having a water block above it. This can be seen in the image on the right. It is unknown whether it is intentional that water is part of the ruin's structure.[1]
    • In the Java Edition though, this is not the case, according to the second picture.[2]

Gallery[edit]

Odd generation[edit]

References[edit]