Mr. Seaweed Monsterman

Seaweed Man[1], also known as Mr. Seaweed Monster Man[2], is a creature who appears in the episode "That's No Lady" and the book Mistaken Identity.

Description
He is a seaweed monster with seaweed for hair, and he wears seaweed. He has red lips, light orange arms, light orange, red, and yellow legs, and a red and yellow colored nose.

Role in episode
When Patrick, who is trying to create a new identity for himself because he believes he is the target of an assassin, suggests to become "Mr. Seaweed Monster Man," SpongeBob indicates that there has already been a Mr. Seaweed Monster Man, at which point Seaweed Man appears and says "Hey!" and waves to SpongeBob and Patrick.

Quotes
"Hey!" (S4 E15)

Trivia

 * His body structure represents a fish.
 * He only has one line in the entire series