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.

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

Growth
When bone meal is on fungi that is planted on matching nylium, it grows into its tall equivalent. Although it can be planted on soul soil, bone meal used on it is wasted unless it is planted on nylium. Crimson and warped fungi grow into crimson and warped huge fungi, respectively. In the Overworld it can grow only  where there is a low light level.

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. This should (by its block tag) also occur when it is placed in a pot.

Sounds
Java Edition: