Join barefoot scientist Jesús Rivas in the murky marshes of Venezuela on his quest to understand these huge, fearsome reptiles. Up to 30 feet long, weighing many times more than the scientists studying them, anacondas are difficult subjects at best, but the National Geographic team captures brilliant footage of them swimming, resting, mating, and hunting prey.
| Actor | Role |
|---|---|
| JJesús RivasNot listed | Not listed |
| MMarcia SavellaNarrator (voice) | Narrator (voice) |