 The eighth season had a cast of six main actors . Tom Kenny provided the voice of the title character SpongeBob SquarePants and his pet snail Gary . SpongeBob 's best friend , a starfish named Patrick Star , was voiced by Bill Fagerbakke , while Rodger Bumpass played the voice of Squidward Tentacles , an arrogant and ill @-@ tempered octopus . Other members of the cast were Carolyn Lawrence as Sandy Cheeks , a squirrel from Texas ; Clancy Brown as Mr. Krabs , a miserly crab obsessed with money and SpongeBob 's boss at the Krusty Krab ; and Mr. Lawrence as Plankton , a small green copepod and Mr. Krabs ' business rival . The season had a number of secondary characters including Jill Talley as Plankton 's computer wife , Karen ; Mary Jo Catlett as Mrs. Puff , SpongeBob 's driving instructor ; Lori Alan as Pearl , Mr. Krabs ' daughter ; and Brian Doyle @-@ Murray as the Flying Dutchman . 
