The Prehistoric Krabs are the prehistoric ancestors of the modern Krabs family. They are seen briefly in the episode "Ugh," in which they are squashed and eaten by SpongeGar. A bunch of crabs run from Patar after he lifts a rock and they say only "money" constantly.
King Krabs was a medieval monarch of Bikini Bottomshire sometime before the 12th century. He is an ancestor of the modern day Krabs family, including Eugene H. Krabs and Pearl Krabs. He has one daughter, Princess Pearl, who resembles the modern day Pearl Krabs. He is enemies with Planktonamor, an ancestor of Sheldon J. Plankton. He appears in the episode "Dunces and Dragons."
Princess Pearl Krabs is the princess of Bikini Bottomshire during her father's reign and an ancestor of Pearl. SpongeBob, Patrick, Squidly Tentacles, and the Dark Knight must rescue her from Planktonamor.
Great Great Grandpa Krabs is mentioned in "Pest of the West" by Mr. Krabs, who said that he invented a money security system. He appeared physically in "Senior Discount."
Mrs. Betsy Krabs is Mr. Krabs and his unnamed sister's mother as well as Pearl and Mr. Krabs' nephews' grandmother.
Great Grandpa Krabs
Great Grandpa Krabs is mentioned in "The Curse of the Hex" when he mentions that there are no such things as curses. He makes his first physical appearance in "Senior Discount."
Mr. Victor Krabs is Mr. Krabs' father who is never seen, but is mentioned and in "My Pretty Seahorse" when Mr. Krabs was telling a story in which his dad gave him a one dollar bill, which he loved, when he was five. Due to his absence in flashbacks of Mr. Krabs' early life in "Friend or Foe," it is likely that he died soon after this event. He also appears in an old photograph in Betsy Krabs' house. There is also a picture in Mr. Krabs' office in "Gullible Pants" that could be him. He first physically appears in "Senior Discount."
Sally
Sally is Mr. Krabs' great aunt who is never seen, but is mentioned in "SpongeBob SquarePants vs. The Big One" when Mr. Krabs promises the Flying Dutchman that he will not spill his groceries again. He lied to the Dutchman, telling him that Sally wore false teeth, but the Dutchman knew about her because he dated her in high school.
Alan Quaterkrab is Mr. Krabs' uncle and Betsy Krabs' brother, since he has a different last name than his nephew. He seemingly never married and without children, Alan died at some point before the series began, leaving all of his belongings to his nephew.
Eugene H. Krabs (born November 30, 1942) is a red crab who lives in an anchor with his daughter Pearl. He is the owner and founder of the Krusty Krab, where he works as SpongeBob and Squidward's boss. Mr. Krabs is obsessed with money and can be very selfish.
Mrs. Krabs is Eugene H. Krabs' either deceased wife or ex-wife. In SpongeBob SquarePants Trivia Book, Mr. Krabs says that Pearl "takes after her mother," which indicates that Mrs. Krabs is a whale. Mrs. Krabs has somehow left Bikini Bottom, although the details are unclear.
Pearl Krabs is a whale who lives in a hollow anchor with her father Mr. Krabs. When she grows up, her father wants her to continue the family business by inheriting the Krusty Krab and becoming its owner. She is always chatting with her friends and talking about things that are only of interest to young girls. She is revealed to be 16 years old in the episode "Whale of a Birthday."
The three nephews of Mr. Krabs who appear in the episode "Stanley S. SquarePants." This also shows that Mr. Krabs has a sister who is never seen. It has to be a girl because Redbeard Krabs said that Mr. Krabs was his only grandson. The nephews are the cousins of Pearl Krabs.
If they have the last name "Krabs," their mother did not change her last name.
