Eugene Harold Krabs, more commonly known as Mr. Krabs (born November 30, 1942), is one of the ten main characters in the SpongeBob SquarePants franchise. He is a miserly red crab who lives in an anchor with his daughter, Pearl, who is a young whale. He is the owner and founder of the Krusty Krab restaurant, as well as the employer of both SpongeBob and Squidward. Mr. Krabs was designed by Stephen Hillenburg, a marine biology teacher. Hillenburg often received fan letters that asked why Pearl is a whale while her father is a crab. Hillenburg simply wanted each member of the main cast to be a different animal. Mr. Krabs is obsessed with money and goes to great length to increase his wealth, to the point where he occasionally treats money better than his daughter and employees. Mr. Krabs' only business competition comes from the Chum Bucket, a failing restaurant run by Sheldon Plankton and his wife Karen. Plankton and Karen are constantly scheming to steal the Krabby Patty secret formula that makes the Krusty Krab so successful.