<Tr> <Th> Years active </Th> <Td> 1992--present </Td> </Tr> <P> Douglas Lawrence Osowski (born January 1, 1969), credited as Mr. Lawrence and sometimes Doug Lawrence, is an American voice actor, show writer, and storyboard artist . He is noted for his work as a writer and voice actor for the animated series Rocko's Modern Life and SpongeBob SquarePants . </P> <P> Lawrence was born in East Brunswick, New Jersey . He is known for his work on the animated TV series SpongeBob SquarePants, on which he has long - running - roles as the voice of Sheldon Plankton and various recurring characters such as the Realistic Fish Head and Larry the Lobster . He physically appears as the live - action artist in "Frankendoodle". </P> <P> He was the voice of Edward T. Platypus, Nurse Leslie, Dave, and Ping - Pong on Camp Lazlo . Lawrence also performed the voice of Filburt in Rocko's Modern Life and is recently the voice of the Announcer and Manant in The Aquabats! Super Show! . Lawrence is a standup comedian, cartoonist, writer - director, animator and producer on the television series Johnny Talk . He worked on The Ren and Stimpy Show in its second season as a layout assistant . Apart from his voice work he is a writer and, since season 10, the story editor on SpongeBob SquarePants and worked as a writer on Rocko's Modern Life and The Twisted Whiskers Show . He is also currently a writer and story editor on Mighty Magiswords, Cartoon Network's first original online series which later became a TV series in June 2016, and provides the voice of Ralphio among other characters . </P>

Who does the voice of plankton from spongebob
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