The Blight is the End jellyfish, a slow moving, floating neutral mob.
Health
54
Attack
2-6
Behavior
The Blight is a neutral mob that will only attack the player if provoked. When attacked the Blight shoots end projectiles at the player which do damage and then they will be randomly teleported.
Spawning
You can find the Blight on all End Islands, except from the Dragon Island. These biomes are: