Episode guide
Series 1
Superfish
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Superfish
Exploring the secrets of the legendary bluefin tuna. Weighing up to 1,500 pounds and moving up to 50 miles per hour, it's one of the sea's most formidable creatures.
Not scheduledNot scheduled
Series 1
Superfish
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Superfish
The billfish is the largest, fastest, and most highly prized of all gamefish, but is rarely caught on film. This stunning documentary reveals her amazing story.
Not scheduledNot scheduled