Cousin Marvin
If you were looking for the article about the fish, then see Marvin.
Character
Marvin[1] in one of the cousins of Sheldon J. Plankton. Unlike Sheldon's other cousins, it is unknown if he is a Plankton or if he is one of Sheldon's maternal cousins. He only appears in "Plankton. A Thank You Would Be Nice."
Description
Sheldon considers Marvin stupid. Marvin is notably smaller than some of Sheldon's other cousins.[1]
History
Cousin Plankon briefly appeared in the short, Plabkton. A Thank You Would Be Nice when Plankton was explaining how Planktons are the most important living creatures on the planet. He uses cousin Marvin as an example who he describes as stupid but he then explains how Marvin has planktonic plant brains that make up half of the Earth's oxygen.
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