Dr. John A. Zoidberg is a lobster-esque alien from planet Decapod 10 and the Planet Express physician.  Zoidberg seems generally clueless about human anatomy and is kind of a homeless loser.  We love him anyway.

Dr. Zoidberg is voiced by Billy West.

Dr. Zoidberg Quotes

Fry: That's the saltiest thing I've ever tasted. And I once ate a big, heaping bowl of salt!
Bender: Oh, come on! That food was fine! The salt content was 10% less than a lethal dose!
Zoidberg: Uh oh. I shouldn't have had seconds.

Zoidberg: Now open your mouth and let's have a look at that brain. No, no, no, no, no, not that mouth!
Fry: I only have one.
Zoidberg: Really?

Futurama Quotes

Farnsworth: (on the phone) Oh, how awful. Did he at least die painlessly? To shreds, you say. Well, how is his wife holding up? To shreds, you say. Very well then. (hangs up) Sad, sad, terrible, gruesome news about my colleague, Dr. Mobutu.
Leela: Was his apartment rent-controlled?

Oh, why couldn't she be the other kind of mermaid, with the fish part on the top and the lady part on the bottom?

Fry