This mod adds more Cave Biomes into the game. Most cave biomes have around a 5% chance to spawn, but the Nether Cave and the End Cave biomes have around a 1% chance. All of these biomes do not have trees, but they do have the mobs from those biomes. To make passive mobs spawn in the cave biomes, light up the cave with torches so the passive mobs can spawn.

Here is the list of all of the cave biomes:

Plains Cave

Forest Cave

Jungle Cave

Desert Cave

Taiga Cave

Swamp Cave

Savanna Cave

Ocean Cave

Nether Cave

End Cave

Comment down below on how many cave biomes you found and any biome suggestions. Have fun finding all of them!