World's Deadliest

Whether at home on land, in the sea or in the air, these creatures turn their habitats into all-you-can-eat buffets. Meet the lethal animals who don't know the meaning of full and whose diets never say die. From piranha that can strip a capybara to the bone in 60 seconds, to the hyperactive shrew that ingests 80 to 90 percent of its body weight each day, to tigers shark that'll devour everything from sardines to suits of armor, these predators makes the hungriest of humans seem like lightweights.

These predators prove that when it comes to hunting prey, size doesn't always matter. Meet the World's Deadliest: Little Killers -- miniscule menaces with the ability to take down prey several times their own size. A fierce 10-inch-long weasel can kill a rabbit 10 times its size; 2-foot-tall Asiatic wild dogs team up to take down 2-ton water buffalo; and a golf ball-sized blue-ringed octopus dominates prey with one of the deadliest neurotoxins on the planet.

Meet the most wrathful, prideful, gluttonous, lustful, greedy, slothful and envious members of the animal kingdom. Gluttonous ornate horned frogs will eat anything in their path -- even their own kind -- before ultimately choking to death. And hell hath no fury like a wrathful hippo whose territory has just been encroached. These docile-looking animals turn into powerful jaws of death if disturbed -- they can even snap a crocodile in half in one bite.

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 for their offspring. Meet protective moose moms, a clan of hyenas that live in a female-dominated society and creatures that mate for life -- including some males who learn too late that mating is literally the last thing they will do in life

Whether it's the frozen fields of Alaska, or the warm waters of Australia, shocking incidents of animals attacking and killing humans, take place all over the world. Usually, the animals aren't looking for a fight - they're simply in the wrong place, at the wrong time, frequently lashing out in an attempt to protect themselves or their offspring. From Asian Leopards severely mauling people in India, to a 2,000 lb. African Cape buffalo that decides to hunt its human hunter, beasts wreak havoc on tourists and townies trying to share their same turf - planet Earth.

In this episode, we continue our countdown of the animal kingdom's deadliest sinners, only this time we turn our attention to the wicked ways of sea and sky predators. Watch how a blue ringed octopus lets his pride dominate over any creature that crosses his path. He'll inject a poison a thousand times stronger than cyanide to show a trespasser who's boss. And we'll discover that a crocodile is so lazy, she'll only feed once a week. But when it's feeding time, watch out. She'll stealthily sneak up on her prey, waiting until the last possible second before striking with the strongest force of any animal on Earth. See how these creatures and the rest of our species list fare when put up against greed, lust, wrath, sloth, gluttony, pride, and envy.

In the darkest corners of the world, deadly predators watch and wait for their next, unsuspecting prey. Armed with special nighttime powers, including extra-strength night vision and hypersensitive hearing, these creatures are anatomically designed to succeed in the dark. From near-invisible leopards ambushing prey from their hideouts in trees, to tiny Tasmanian Devils devouring a full carcass from the inside, out - this hour of WORLD'S DEADLIEST is dedicated to the NOCTURNAL KILLERS.

The cheetah, the stargazer fish, and the venomous black mamba are among nature's quickest killers.