Blood Jelly is a Hard Mode enemy that swims in the waters of The Crimson. It follows the same A.I. as normal Jellyfish, but their speedbursts are more rapid. Caution should be taken for early Hard Mode players in the waters of the Crimson as swarms of Blood Jellies can easily overwhelm the player and, because they blend so well with their surroundings, they aren't always easy to spot.
- Added to the game.