Zoidberg (full name Dr. John A. Zoidberg) is one of the main characters of Futurama. He is a Decapodian, a crustacean-like species of Alien, who works as the staff doctor for Planet Express, despite his woeful understanding of human physiology and allusions to his questionable credentials.
Zoidberg is named after an Apple II game that series writer David X. Cohen created in high school called Zoid, similar to the game Qix. The game was rejected by Broderbund. One of Cohen's inspirations for the character of Dr. Zoidberg was the fact that Star Trek character Leonard McCoy, the ship's doctor, frequently administered medical treatment to aliens such as Spock, so Cohen wished human characters in Futurama to be in the uneasy situation of being treated by an alien doctor.