Underwater magma

Underwater magma is a feature found underwater in the Overworld.

Underwater magma

Biomes	Any Overworld biomes
Generates in existing chunks	No
Consists of	Magma block

{
    "title": "Underwater magma",
    "rows": [
        {
            "field": "Any (link to Overworld article, displayed as Overworld) biomes",
            "label": "(link to Biome article, displayed as Biomes)"
        },
        {
            "field": "No",
            "label": "Generates in<br>existing chunks"
        },
        {
            "field": "\n* <span class=\"nowrap\"><span class=\"sprite-file\" style=\"\">(link to File:BlockSprite magma-block.png article, displayed as 16x16px|link=Magma block|alt=|class=pixel-image|)</span>(link to Magma block article, displayed as <span class=\"sprite-text\">Magma block</span>)</span>",
            "label": "Consists of"
        }
    ],
    "invimages": [],
    "images": [
        "Underwater magma.png"
    ]
}

Generation

An underwater magma is a feature made entirely of magma blocks. It is up to 3×3×3 in size. It can be found at the underwater floor in any Overworld biome.

Data values

ID

Java Edition:

Feature type	Identifier
[No displayed name]	underwater_magma

Configured feature	Identifier
[No displayed name]	underwater_magma

Bedrock Edition:

Feature	Identifier
[No displayed name]	underwater_magma_feature

which is used in:

Feature	Identifier
[No displayed name]	underwater_magma_snap_to_surface_feature

which is used in:

Feature	Identifier
[No displayed name]	underwater_magma_underground_feature

Config

Java Edition:

• [NBT Compound / JSON Object] config
  • [Int] floor_search_range Value between 0 and 512 (inclusive).
  • [Int] placement_radius_around_floor Value between 0 and 64 (inclusive).
  • [Float] placement_probability_per_valid_position Value between 0.0 and 1.0 (inclusive).

An example

{
  "type": "minecraft:underwater_magma",
  "config": {
    "floor_search_range": 5,
    "placement_probability_per_valid_position": 0.5,
    "placement_radius_around_floor": 1
  }
}

History

Java Edition
1.17			21w06a				Added underwater magma, which generates at the bottom of underground bodies of water.
1.18			experimental snapshot 6				Underwater magmas more frequently generate in underwater caves.
			21w40a				The frequency of underwater magma generation has been slightly increased.
Bedrock Edition
1.18.0			beta 1.18.0.22				Added underwater magma.

Gallery

• 

  Two patches of underwater magma in a flooded cave.