That was some plan they had. First, spreading the phony story about Cutler, and then stealing the yachts from the marina.
8 seconds sound clip from Scooby-Doo, Where Are You! - A Clue for Scooby Doo (S1E2).
You can hear this line at 00:20:28.508 in the Blu-ray version of the episode.
Quote context
[...]
- Uh-huh.
- Now, let's see if our mystery ghost diver is really Ebenezer Shark.
- I got it! Does this seaweed help remind you of that picture on Widow Cutler's wall?
- That night on the beach, Cutler was storing extra scuba tanks in the Graveyard of Ships.
- Yeah, but, like, his diving suit got covered with that kooky glowing seaweed.
- And that's where the glowing ghost story came from.
- Well, that closes the mystery.
- I guess that's... another mystery.
[...]