20000 Leagues Under the Sea (1954)

The oceans during the late 1860-92s are no longer safe; many ships have been
lost. Sailors have returned to port with stories of a vicious narwhal (a giant
whale with a long horn) which sinks their ships. A naturalist, Professor
(Pierre) Aronnax, his assistant, Conseil, and a professional whaler, Ned Land,
join an US expedition which attempts to unravel the mystery.

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20000 Leagues Under the Sea (1954)