The Scooby-Doo Show

Scooby-Doo, Where's the Crew? (1x13)

Air date: Nov 27, 1976

The gang goes on a cruise abord the 'Sea Prowler' and come into contact with the Ghost of Captain Pescado. Turns out the ghost is pretty ok for a ghost, just as long as you don't go near his undersea treasure trove like the gang decided to. Then, Captain Pescado can turn into a pretty mean ghost.