Shaggy and Scooby hook a frozen caveman and present the chilly artefact to Oceanland. But the creature is mysteriously thawed out and goes on a rampage.

While vacationing on a sailboat, the kids aid Naval Intelligence to halt the mysterious disappearances of airplanes.

A terrifying Sea Beast frightens divers near Acapulco's famous cliffs.

The gang's tropical island vacation gets ruined when they stumble across a boat-smashing sea monster. The terrifying ocean creature, Notto Mori, is reputedly the spirit of the island.

Scooby and the gang solve mysteries at sea.