Marine biologists investigate why Australian waterways have become hunting grounds for some of the most dangerous shark species known to man.
Deep in the rainforest of Nicaragua, Zeb seeks 300-pound giants said to lurk in the largest lake in Central America and a secluded jungle river.
A look at the jaws, poison and powers of the nightmarish creatures lurking in the world's seas.
Tropical battlegrounds play host to monitor lizards who fight like wrestlers, and a python hunting for lunch who finds himself on the menu.
A look at some of the unusual skills and abilities possessed by animals, which they use in order to overcome their foes when engaged in battle.