NARRATOR: These safari tours are about to get
the sighting of their lives.
Hippo versus bull shark.
The strongest bite force of all mammals
faces off with the strongest bite force of all sharks.
[dramatic music]
Just 150 miles south of Ryan's study site,
at St. Lucia estuary, one of Africa's
largest tidal wetlands--
a watery mix of fresh and salt. Shallow.
Warm.
Just right for bull sharks.
And a once in a lifetime encounter on safari.
[dramatic music]
This shark was probably chasing a fish when it
caught the hippos by surprise.
Africa's deadliest large land animal.