The Swamp Creature was the disguise of Captain Karnby.
Physical appearance[]
It's a large, humanoid fish-like creature with green skin, yellow eyes and sharp teeth. It also has a long tail, claws, webbed feet, a light green belly and a fin that goes down it's back.
Personality[]
It was threatening, but it was also shown to easily be forced into things as it had to start a food fight with the gang because that's what they wanted.
Skills and abilities[]
It was extremely agile by doing side-flips to dodge food.
History[]
Scooby-Doo! Mystery Cases[]
Karnby unmasked.
It attacked the gang when they were having a picnic at a swamp and tried to scare them away, but they didn't run away. Instead, he got a tomato thrown at him by Daphne, which didn't phase him at all, he then threw broccoli at her which got deflected by Shaggy using a baguette. Everyone then grabbed their own supplies and start a huge food fight
The fight happened to last for awhile and he was able to get the upper hand for the most of it, dodging upcoming food, taking out Velma and he was about to finish off Shaggy. But it got cut short when Daphne placed a Banana peel on the ground when he wasn't looking, making him slip and land on the ground.
He was then unmasked to reveal it being Captain Karnby, a restaurant owner who was scaring people away so he could buy the swamps land for his business.