Now, let's see if our mystery ghost diver is really Ebenezer Shark.
4 seconds sound clip from Scooby-Doo, Where Are You! - A Clue for Scooby Doo (S1E2).
You can hear this line at 00:19:54.260 in the Blu-ray version of the episode.
Quote context
[...]
- Then we hoist him high as a Christmas goose.
- OK, gang, start Operation Noisemaker.
- Here he comes. Let him have it!
- Scooby! He can't see where he's going!
- 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.
[...]