Fungus

Fungi are mushroom-like blocks that generate in the Nether. There are two types of fungus: crimson fungus and warped fungus.

Natural generation
Fungi naturally generate in the crimson forest and warped forest biomes. Crimson fungi most commonly generate in the crimson forest biome and warped fungi most commonly generate in the warped forest biome.

Post Generation
$$ applying bone meal to nylium causes fungi to appear nearby, similar to flowers on grass blocks. While fungi of both types do generate this way, they are more likely to be the same type as the nylium.

Obtaining
Fungi can be mined instantly with any tool or with no tool.

Usage
Fungi may be placed on grass blocks, dirt, coarse dirt, podzol, farmland, nylium, and soul soil. Attempting to place it on any other block will not work. Fungus requires a solid block underneath it, and will pop off and drop itself if it is no longer supported.

Growth
When bone meal is on fungi that is planted on matching nylium, it grows into its tall equivalent. Crimson and warped fungi grow into crimson and warped huge fungi, respectively.

Breeding
Crimson fungi can be used to breed hoglins and lead them around.

Hoglins
All hoglins, irrespective of age, avoid and run up to 7 blocks away from warped fungi when it is placed on a block or inside of a flower pot.

Sounds
Java Edition: