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

Clem is the leader of Plankton's cousins. He first appears in the episode "Plankton's Army."


He is a light green plankton with an overbite and misshapen 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 the 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.

"Something Narwhal This Way Comes"

He answers the phone when Plankton calls his family.