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Kujira gami (1962)

IMDb: 7.0
1962

A fishing village is terrorized by a giant whale, and the fishermen are determined to kill it A Japanese variation of the Moby Dick story

Gamera tai Shinkai kaijû Jigura (1971)

IMDb: 3.6
1971

Space aliens arrive on Earth with their giant shark and intend to take over the planet but they must first destroy Gamera