Hey look, everybody! It's Cousin Plankton!
— Clem, "Plankton's Army"

Clem is the leader of Plankton's cousins. He appears in the episodes "Plankton's Army" and "One Coarse Meal," and the games Dinner Defenders and Plankton's Robotic Revenge.


He is a light green plankton with an overbite and messy teeth. He has a light yellow eye and wears a messy, light blue hat made out of rags.


He was born to a brother of Gordon Plankton and is one of the many first cousins to Sheldon J. Plankton.

Role in series

"Plankton's Army"

He is contacted by his cousin Sheldon J. Plankton, who needs his family's help to obtain Krabby Patty secret formula. He is introduced as the leader of the rest of Plankton's cousins, since he does most of the speaking. Clem re-introduces Sheldon to his family, when he seems unfamiliar with them. But after going on and on introducing the hundreds of the family members, Plankton screams at him to stop.

"One Coarse Meal"

He appears in Plankton's flashback about his family being eaten, and then appears again inside Pearl during Plankton's nightmare.


  • He was the character who revealed Plankton's first name.
  • Unlike the rest of his family, he cannot read.
  • In the episode "Plankton's Army," he was voiced by Dee Bradley Baker, but in the video game Plankton's Robotic Revenge, he was voiced by Bill Fagerbakke instead.
Plankton (VE)

Sheldon J. PlanktonClemRufusRainchildGordon PlanktonLily PlanktonBasiaAlvinSilas PlanktonPlanktonamorDead Eye PlanktonGrand Dad PlanktonGreen PlanKrabIdeal PlanktonCousin MarvinDream Lily PlanktonMama PlanktonMoe BrosPlanKrabPlankton zombiesPlanktonamorRed PlanKrabSeymourSheldon J. Plankton (Bikini Bottom 2)

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