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Jungle Catfish

Biologist Zeb Hogan holds a piramatuba, a species of red-tailed catfish, in a small fishing village just outside of Porto Velho. To arrive, the rafting team had to conquer the class five rapids of the Rio Roosevelt.

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Hogan teams up with experts to explore a forbidding 400-mile-long river: the Rio Roosevelt. They'll have to navigate Class V rapids, avoid potentially violent tribesmen and survive in one of the most unforgiving places on the planet. The team hopes to find giant piranhas, painted catfish and perhaps even a new species of fish unknown to science.