From Wikipedia, the free encyclopedia. Eugene Harold Armor Abs Krabs, or simply Mr. Krabs is a fictional character in the American animated television series SpongeBob SquarePants. He is voiced by actor Clancy Brown, and first appeared on television in the series' first episode  Help Wanted  on May 1,1999.r. Krabs served in the navy, and in the episode Krusty Krab Training Video it is revealed that Mr. Krabs served during a time of war, and fell into a depression after finishing his service.