Aquaman (1967)

The War of the Quatix and the Bimphars (1x32)

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Aqualad and Tusky are racing home when they run into Aquaman who informs them they are needed for a top-secret assignment. When they arrive for a briefing they are told that a new planet has been discovered, planet Q-344. The new planet is entirely covered in water and is inhabited by intelligent life. Aquaman agrees to explore the new planet for the government.