Mushroom Fields

Mushroom Fields
Features	Huge Mushrooms
Blocks	Mycelium; Mushroom Blocks; Mushrooms; Sugar Cane; Short Grass; Grass Block‌
Climate
Temperature	0.9
Downfall	1.0
Precipitation	Yes
Colors
Grass color	; #55C93F
Foliage color	; #2BBB0F
Water color	; #3F76E4‌; ; #8A8997‌

Mushroom fields, commonly referred to as mushroom islands, are rare biomes which always generate as islands surrounded by deep oceans. They are the only place in the game where mycelium and mooshrooms are found, and have the special property that no hostile mobs normally spawn in them.

Description

Mushroom fields make up about 0.15% of the Overworld's area. They generate in areas where the continentalness values are the lowest, meaning they almost always generate as islands very far away from major landmasses, and are bordered by deep ocean biomes (which have the second-lowest continentalness values) of any temperature. The islands have the occasional tendency to be close to one another, resulting in multiple mushroom fields separated by only a few hundred blocks. It is impossible for the player to spawn in the mushroom fields biome, unless there is no other spawnable biome for thousands of blocks.

The mushroom fields generate in usually flat islands and have mycelium instead of grass blocks on the surface. Grass blocks that are placed by the player in this biome take on a bright green color, similar to the grass found in jungles. In Bedrock Edition, grass blocks can generate in exposed carver caves.^[2] A large amount of brown and red mushrooms cover the land. It is one of the only biomes, along with swamps‌ and dark forests, where huge mushrooms generate naturally. Sugar cane and grass sometimes generate by the ocean.^[1]

The huge mushrooms generate with a density high enough to be a reliable source of mushroom blocks, but low enough not to significantly obstruct vision. Here, mushrooms can grow in full sunlight. Water is a light gray color in Bedrock Edition.

Mushroom fields are the only biome where mooshrooms naturally spawn. Red mooshrooms, bats‌, and glow squids are the only mobs that spawn naturally in this biome; this also applies in caves, mineshafts, and other dark structures under the island, meaning the biome is mostly safe both above and below ground.

However, monster spawners found in mineshafts, monster rooms, or strongholds continue to spawn mobs, raids can still spawn illagers, drowned may rarely enter the biome from the surrounding deep ocean at night, and wandering traders along with trader llamas can still spawn here. Additionally, lightning strikes can transform red mooshrooms into brown mooshrooms or vice versa. If the player has not slept in three nights, phantoms spawn in the biome as well‌^[3]. Also, lush caves can sometimes generate underground, allowing for monsters to spawn naturally.

Mobs

The following mobs are naturally spawned here：

In **Java Edition**
Mob	Spawn weight	Group size
Creature category
Mooshroom	1	4–8
Underground water creature category
Glow Squid	1	4–6
Ambient category
Bat	1	8

In **Bedrock Edition**
Mob	Spawn weight	Group size
Creature category
Glow Squid	¹⁰⁄₁₈	2–4
Mooshroom	⁸⁄₁₈	4–8

Data values

ID

Java Edition:

Name	Identifier	Translation key
Mushroom Fields	`mushroom_fields`	`biome.minecraft.mushroom_fields`

Bedrock Edition:

Name	Identifier	Numeric ID
[No displayed name]	`mushroom_island`	`14`

History

Java Edition
July 1, 2011							Notch mentions the idea of a biome where huge mushrooms generate naturally.
1.0.0			Beta 1.9 Prerelease				Added Mushroom Island.
1.7.2			13w36a				With ocean biomes becoming much smaller, mushroom island biomes have become much rarer.
1.7.2			13w36a				Mushroom island is now required for the new "Adventuring Time" achievement.
1.13			18w16a				Renamed "MushroomIsland" to "Mushroom Island".
1.13			18w19a				Renamed "Mushroom Island" to "Mushroom Fields".
1.17			Pre-release 1				Sugar cane and grass now generate in mushroom fields.^[1]
1.18			Experimental Snapshot 1				It's no longer possible for mushroom fields to generate connected to other land biomes.
			experimental snapshot 5				Mushroom fields have been tweaked to better match the shapes of islands.
			?				It is no longer possible to spawn in mushroom fields.
1.20			23w17a				"A Familiar Room" can now be played in mushroom fields.
Pocket Edition Alpha
v0.9.0			build 1				Almost all biomes as of Java Edition 1.7.2 have been added, including Mushroom islands.
v0.11.0							Due to a bug, the game now fails to load chunks with mushroom island biomes.
v0.12.1			build 2				Fixed the above bug.
Bedrock Edition
1.21.60			Preview 1.21.60.23				Mushrooms now generate in larger patches.
1.21.90			Preview 1.21.90.26				Added purple atmospherics, color grading, fog, and lighting to mushroom fields in Vibrant Visuals.
Legacy Console Edition
Xbox 360	Xbox One	PS3	PS4	PS Vita	Wii U	Switch
TU7	CU1	1.00	1.00	1.00	Patch 1	1.0.1	Added Mushroom islands.

Data history

Java Edition
1.13	17w47a	If numeric IDs for biomes were ever deprecated, it was most likely in this version.
1.13	pre5	Changed the ID from `mushroom_island` to `mushroom_fields`.
1.19	22w11a	Added `#without_zombie_sieges` tag created to replace the hard-coded check for mushroom fields biome.

Issues

Issues relating to "Mushroom Fields" or "Mushroom Island" are maintained on the bug tracker. Issues should be reported and viewed there.

Trivia

The vanilla Mushroom Fields JSON data includes the pumpkin patch feature, but it fails to generate because the pumpkin patch configured feature specifies placement on grass blocks only.^[4]

Gallery

Screenshots

A mushroom fields biome in a frozen ocean in Java Edition.
Mushroom fields surrounded by a frozen ocean in Bedrock Edition.
The Mushroom Island seed template thumbnail.
An azalea tree in mushroom fields.
Grass blocks generated in carver caves in Bedrock Edition.
A cheese cave in a mushroom fields biome.
Mushroom fields in Bedrock Edition.
An extremely large mushroom fields biome.
Efe staring down into a cave in a mushroom field.
Makena gazing out of a hole.

Before 1.18

A small mushroom island with three mooshrooms and three brown mushrooms.
The view of the mushroom fields biome atop the huge mushroom.
A mushroom field biome connecting with a giant tree taiga biome in Java Edition 1.17.
A mushroom biome connected to a forest biome in Java Edition 1.16.2.
A mushroom biome in Pocket Edition.
A mushroom fields single biome world before 1.18.
The rare occurance of mushroom fields connected to a frozen river and snowy plains.
A "chunk cliff" containing a birch forest, ruined portal, and mushroom fields.
A village reaching into mushroom fields.
Sunset in mushroom fields.
A mushroom fields surrounded by a frozen ocean and connecting to a savanna in Bedrock Edition 1.13.0. Note the village in the background.
Mushroom fields with badlands in the distance.
Mushroom fields with ray tracing.