Pearl Krabs (Lori Alan) is Mr. Krabs' teenage sperm whale daughter. The series has yet to explain their disparity in species, although in the book SpongeBob's Trivia Book, Mr. Krabs explains that Pearl takes after her mother, meaning her mother was

apparently also a whale. Occasionally in the series, Mr. Krabs will exclaim, " Mother of Pearl!" possibly referencing her mother. Her mother is never seen nor addressed in the series (Krabs is portrayed in the series as being a single man). Pearl is frequently embarrassed by her father's cheap attitude and often forces him to try and change his habits