Mister Seaweed Monsterman is a green seaweed monster who only appeared for a gag in the episode, "That's No Lady". 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 Monsterman", SpongeBob indicates that there already is a Mr. Seaweed Monsterman, at which point Mr. Seaweed Monsterman appears and says “Hey!” and waves to SpongeBob and Patrick. He has a large pile of seaweed for his body and little dash of kelp for a hairpiece. He has not appeared in an episode since. He has stripes on his nose and his legs which probably means his whole body is striped.