A hamster is a small herbivorous rodent belonging to the family Cricetidae. This species is known to inhabit planet Earth.
- It was seen in the Invader Zim episode "Hamstergeddon" where a hamster called Peepi was turned into a giant monster by Zim.
- They make a brief appearance in the film Aliens, where the motion tracker's signal is mistaken for a threat.
- "Weird Al" Yankovic has a song called "Attack of the Radioactive Hamsters from a Planet Near Mars".