Mobs
Ambient
| Mob | Share | Group |
|---|---|---|
 Bat | 100% | 8 |
Monsters
| Mob | Share | Group |
|---|---|---|
 Spider | 19% | 4 |
 Creeper | 19% | 4 |
 Slime | 19% | 4 |
 Zombie | 18% | 4 |
 Skeleton | 14% | 4 |
 Bogged | 5.8% | 4 |
 Enderman | 1.9% | 1–4 |
 Zombie Villager | 1.0% | 1 |
 Witch | 1.0% | 1 |
| Slime | 0.20% | 1 |
Underground water creatures
| Mob | Share | Group |
|---|---|---|
 Glow Squid | 100% | 4–6 |
Share is how often each mob is picked when the game spawns that kind of mob here.
Structures
- Abandoned camp swamp
- Mineshaft
- Ruined portal (Swamp)
- Stronghold
- Trial Chambers
- Witch Hut
Blocks
Trees and plants
Ores and stone underground
Lakes, springs and other features
From the biome's world generation features and surface rules.