The Floaty Gross is a floating Hardmode enemy that spawns in the Underground Crimson. They can float through blocks in a manner similar to Wraiths and can inflict the Weak debuff. They are immune to the Confused, Poisoned, Venom, On Fire!, Cursed Inferno, and Shadowflame debuffs. Because of their low knock-back resistance and ability to pass through walls, weapons with low knock-back will be more effective against them in the narrow confines of the Underground Crimson.
- Like other enemies that can pass through tiles, Floaty Grosses cannot spawn if the player is in front of a housing background wall.