|This needs a stretch. (Feel free to remove when satisfied of completion.)|
* History is incomplete.
The Seaweed Monster was the disguise of Cowabunga Carlyle.
It looks like a green seaweed humanoid with red eyes.
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The New Scooby and Scrappy Doo Show
It was used to scare away surfers while Carlyle searched for the lost treasure of Scareruba.