|First appearance||Less than Hero|
|Voiced by||Billy West|
- "Yet the Zookeeper escaped, thus proving that the deadliest animal of all... is the Zookeeper!"
The Zookeeper is a criminal who can command animals to do what he wants. He tried to steal the Quantum Gemerald, a big emerald cross, from The Museum of Natural History but was stopped by The New Justice Team. Soon after the Zookeeper finds out that Leela is Clobberella and ends up kidnapping her parents and holding them for ransom in exchange for the Gemerald, forcing the Justice Team to steal the gem and hand it over to the Zookeeper, who then leaves.