Shaggy and Scooby enter a sandcastle building competition in Australia, but later discover that a monster made from coral is on the loose, and the builders are disappearing under the sand.
This episode contains examples of the following:
- Attack of the 50-Foot Whatever: This episode features a giant coral monster. Though it's actually not the main antagonist in disguise, and is indeed real. The only reason it even attacked was due to the actual villain mining through its home.
- Covered in Mud: Spencer Johnson pulls the sandcastle competitors down through the sand, covering them with mud in the process, so they can build his underground freeway.
- Gentle Giant: The "Coral Creature", which turns out to be one of the few (if not only) times where the monster was real.
