Dr. Zoidberg is an Orthodox Jew. His last name is a clear indicator, but he also possesses many other Jewish qualities. He has written movie scripts, and has a love for gefilte fish. In addition, he is a very frugal crustacean, making wise investments, especially in the vending machine sandwich market. The funny thing is, Zoidberg is a shellfish and therefore not kosher; boy does that fish have a schtick!