The 恶心浮游怪 is a floating 困难模式 敌怪 that spawns in the 地下猩红之地. They can float through 物块s in a manner similar to 幻灵s and can inflict the 软弱 减益. They are immune to the 困惑, 中毒, 毒液, 着火了！, 诅咒地狱, and 暗影焰 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.
- 1.2.1：Can now inflict the 软弱 debuff and can drop 维生素.