| PC-Only Content |
This information (or parts of it) applies only to the PC version of Terraria.
The Floaty Gross are Flying enemies that spawn in the Underground Crimson once Hardmode is activated. They can go through walls and can inflict the Weak debuff. They are immune to all Debuffs except for the Frostburn debuff from the Frost Armor set. They, like all others Crimson Hardmode mobs, have a chance to drop the Meat Grinder, which is used to make Flesh Blocks and flesh furnitures. They also have a chance to drop Vitamins and their respective banner.
Even though the Floaty Gross appears to be a phantom/ghost, it still drops a vertebrae. This change is probably due to there being a somewhat uncommon spawn rate of the other enemies that can drop vertabrae in hardmode. (i.e. They only spawned in the surface crimson biome and were more common on the actual surface).