A look at the jaws, poison and powers of the nightmarish creatures lurking in the world's seas.

In the animal kingdom, females are tough, feisty and fearless. But these lady-killers don't just get by on their good looks; they use their paws, claws and jaws to ensure survival – for themselves and their offspring. From the fierce protectiveness of a mama grizzly bear, to the cunning teamwork employed by lady lions – this hour of WORLD'S DEADLIEST is dedicated to the KILLER BITCHES.

http://channel.nationalgeographic.com/wild/episodes/lady-killers/

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Dive deep into the world of group predation with a look at twelve different species that use teamwork, strategy and communication to hunt more effectively than they otherwise would be able to alone.

Sitting high atop the food chain, these are the killers that even predators fear: the apex predators. These spectacular creatures have won the carnivore's lottery and are used to getting their way.

From claws and teeth to chemical warfare and sonic power, predators have evolved specific weapons that make them efficient killing machines. These species show what it takes to survive and thrive.

These fantastic creatures take everyday abilities to the extreme. Some have powers far removed from the usual. In the battle of life and death, these predators have the advantage of a wild card.

In just about every animal struggle, there's a winner and a loser. The stakes are often life or death. The motives for combat are varied, but they usually boil down to this: food, territory or sex.

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Wrangling snakes is more art than science, and the stakes are high. Get ready to go hand-to-scale and face-to-fang with cold-blooded killers.

Some you see and some you don't, but they all have eight legs and bulging eyeballs. This is a nightmare of the arachnid kind.

We don't have an overview translated in English. Help us expand our database by adding one.

We don't have an overview translated in English. Help us expand our database by adding one.

We don't have an overview translated in English. Help us expand our database by adding one.