Mob Spawning

As you purify the Nether, you'll slowly attract new forms of fauna into the world. These mods will spawn randomly around the player while in a location with a high enough purification level. These spawns are independent from Mob Swapping

Required Purification Level

Mob	Purification Level
Squid	600
Salmon	600
Cod	600
Pufferfish	700
Tropical Fish	1,000
Axolotl	1,000
Wandering Trader	1,500