Before Using the addon for a world, Turn on All the experimental features and make sure you are in the latest betas and official versions for better support of custom caves 

Sakura Forest

Sakura Forest have pink trees that are scattered across the biome.

The leaves of the sakura trees also have a chance to drop a cherry petal, this is used to craft a pie

Revamped Swamp
Now the swamps are more extensive, these include mangrove trees scattered throughout the biome

Mega Pine Forest

This is a rare biome , these include big oak pine trees scattered throughout the biome

Crystal Caves
These caves are less frequent than the others, here you can find 6 types of crystals that together with the Alexandrite shard can create a rainbow shard

Rainbow shard
This crystal shard is used to create new things, such as the rainbow lantern or the friendly spider's nest

Spider Hive Cave

This cave biome usually generates with some spiders and more variants of cobweb ( Cobweb Block, Cobweb Carpet, Cobweb vines, Deepslate with Cobweb )

Some images of the Generation of this biome:

Lumen Caves

Lumen Caves are a peaceful biome without any hostile mob, many types of vegetation grows here, there are twisted lumen vines, lumen vines, lumen corals and alexandrite geodes.

Some Images of the Generation of this biome:

Alexandrite Geode found in a lumen cave!

Alexandrite Geodes Blocks ( Budding Alexandrite, Alexandrite Geode, Marble and Slate )

Mobs in this biome:

Lumen Beetle

Damage: None

Effects: None

Health: 10

Sculk Caves

This Cave Biome is a variant of the upcoming Deep Dark Caves, they have patches of sculk blocks and vegetation like sculk vines or sculk roots.

Currently these caves are the home of sculk bats

Cold Caves

Cold caves are full of cold stone, you can found sapphire ore here, Sapphire can be used to craft sapphire lamp

Limestone  Caves

These Caves spawns under Desertic biomes

Usually they have limestone, hanging moss and ore variants for limestone

Aquatic Mobs

Blobfish

¿ Arent they cute and ugly at the same time? 

These mobs spawns at y-40 to y50 so you can found them in aquifers or oceans and they attack nautilus

Nautilus

Finally you can find nautilus shells more fast!

Drops nautilus shells ( You can get 1-2 with looting enchant )

Spawns at oceans, aquifers and rivers

Betta Fish

This tiny fishes spawns at rivers, oceans and sometimes in aquifers

They have 4 common variants ( Blue, Dark Blue, Yellow Mixed and Orange Mixed ) and 2 Rare Variants ( Copper-like and Golden )

Jellyfish

These jellyfishes spawns at aquifers, warm ocean and rivers

They have 3 variants ( Lucy, Golden and Blue [ Emmisive ] )

Platypus

These amphibious spawns at Swamps and Rivers

You can get an easter egg by naming it "Perry"
Even so, after this description there are many things that you should discover, enjoy our addon and thank you for downloading it