Underwater Dungeon

Not to be confused with Atlas(Boss).

Atlas is a biome similar to the the ocean that spawns after Wall of Steel have been defeated. It is usually beneath the dungeon or near the ocean biome. It cannot spread through biomes unlike the Corruption, Crimson and the Hollow. The Atlas is filled with water like the ocean and has a Atlas Temple at the bottom of the Atlas.

The Mobs that in the Atlas