- "Once more, the Harpies come to tease and taunt us! "
- — Nero Blackstone when a Parasite round starts
Parasites are enemies in Call of Duty: Black Ops III that appear on the Zombies maps Shadows of Evil, Dead Ops Arcade 2: Cyber's Avengening, Revelations, and throughout the Nightmares campaign. Parasites are flying creatures that attack the player in various numbers. They attack by shooting a liquid at the player which covers the screen, impairing vision slightly, and dealing damage.
In Shadows of Evil, Parasites are yellow-colored, shooting yellow liquid as their attack. Much like Hellhounds, Parasites appear during their own special round and the last one killed drops a Max Ammo. They also appear after a Margwa's head has been taken down. They can also appear occasionally in later rounds, in the "Capture The Flag" objective in the Easter Egg, and even spawn from a harvest pod. The parasites also show up in the Pack-a-Punch wall-run on the side of the Apothicons during the Great War.
In Dead Ops Arcade 2: Cyber's Avengening, they act as in Shadows of Evil, but only appear after one of the Margwa's heads are destroyed.
- Parasite-Seeing (35 /Bronze Trophy ) - Kill 5 Parasites while riding on the train.