Secrets of the lethal weapons of the animal world.

Animals that have developed amazing survival tactics are featured, including elk growing and wielding their antlers, bison utilizing stampedes, mantis shrimps exploiting deadly precision and speed, and kangaroos using their powerful legs.

Animals known to effortlessly blend into their environment are featured, including a zebra disappearing into tall grass, chameleons altering their external colorations for disguise, and arctic foxes hiding in their snow-covered landscape.

Deadly animals armed with venom are shown hunting in the wild, including a funnel-web spider that latches onto its prey to unleash surprising amounts of venom through repeated bites, and a blue-ringed octopus that blends into the sea floor.

Walruses rely on its spit to help them eat; cobras violently release a stream of venomous saliva towards a predator's eyes to blind it; jawfish use spitting as a means of defense and to build its home; bees use their stingers to protect its colony.

Featuring animals that use special odors or secretions to deter predators, the ocean cuttlefish uses a quick blast of ink to confuse and evade predators and the skunk has become infamous for its pungent spray that is uses when threatened.