Moby Dick and the Mighty Mightor

The Vortex Trap [Moby Dick] (1x38)

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Vortan and his men use a powerful vortex to capture approaching underwater vessels. They turn it on when they pick Moby up on their radar thinking that he is a vessel. Moby and the boys survive the vortex but find themselves trapped between the vortex and Vortan and must fight their way out if they are going to survive.