| "The sharp spikes can penetrate any space boot."|
|Base Health|| 50 HP|
|Base Damage|| 8 HP|
|Found In||Decayed Biome|
|Unique Drops||Hardened Carapace (20%)|
Crustoises are a unique monster found in decayed, desert, forest, jungle, magma, midnight, savannah, and volcanic biomes. They can also be found in the Desert Subsurface underground layer as well as in Stone Caves and underground layers 0a, 1d, 3b, 5a and 5d.
They can crawl on walls and ceilings, enabling them to move over any surface. Their primary attack is to dash at the player, revealing their underside and face.
This monster possesses a weakness (+50% damage taken) to Poison damage and a resistance (-50% damage taken) to Fire damage. Additionally, it cannot be inflicted with Burning.