Moby Dick and the Mighty Mightor

The Undersea World [Moby Dick] (1x2)

Air date: Sep 09, 1967

An underwater earthquake buries Moby and the boys under tons of rock. But they end up in an undersea world where Moby Dick has to protect Scooby and the boys from various dangerous creatures like giant insects, clams, mutant seaweed, eels, and Reptile Men as they try to find their way home.