Mr. Krabs

Eugene Harold Krabs (born November 30, 1942) better known simply as Mr. Krabs or called Krabs by Plankton is a red sea crab who is the owner of the Krusty Krab as well as the employer of both SpongeBob SquarePants and Squidward Tentacles. Creator Stephen Hillenburg describes Krabs as another primary antagonist of the series. He is extremely greedy, selfish and quite literally obsessed with money itself. Mr. Krabs is mostly respected by SpongeBob, while Squidward tends to loathe him. Mr. Krabs' greed in the series is exaggerated with him often anthropomorphizing money. He will do almost anything to obtain money or not lose it, usually with no regard to the safety or well-being of others or even himself. His arch-nemesis and business rival is Sheldon J. Plankton, who was his friend in their childhood but now constantly attempts to steal the Krabby Patty Secret Formula. Mr. Krabs has a daughter, a sperm whale named Pearl. Since the beginning of the series, Mr. Krabs' overall characterization has become more and more negative, to the point that Stephen Hillenburg himself once said in an interview that he and Plankton are both the primary antagonists (in some episodes) of the show, with Mr. Krabs being just as bad, if not worse than, Plankton himself.

Trivia

 * He is also a villain when he gets greedy for the average green stuff.