Venomous critters roam both land and sea in Australia. Under the ocean's surface is an entire world of swimmers inflicting pain and paralysis.

Cameras capture creatures with a mean streak and lightening-quick reflexes, including a tiny grub with potent itch power and a giant water buffalo.

From city fliers and ocean swimmers to outback dwellers and even an extinct species, see how this group of beasts ranks on the danger scale.

Take an insider's look at Australia's most deadly and diminutive species, including a virus-carrying mosquito and the waterhole-dwelling olive python.

Meet a wild canine with cute puppies and a bad reputation. Learn why the wild dingo may look cuddly, but is a deadly playmate.

This episode reveals how a soothing dip in Australia's ocean can turn terrifying when the cold eyes and sharp teeth of a shark appear.

This episode focuses on deadly creatures' playful ways, including the brutal sea lion, the poisonous stonefish and the furry fruit bat.

This episode focuses on dangerous beasts and their natural weapons: Talons, teeth, fangs and tentacles are all used as instruments of pain and death.

Visit with one of Australia's most feared ocean dwellers: The stingray glides through the water, waiting to inflict pain with it's barbed stinger.

See how Australia's grasslands harbour animals are worth worrying about, especially the venomous reptiles that slither amongst the country's green fields.

Which beast has the most vicious bite? It might be the jaws of an ancient creature, a rare reptile's fangs or poisonous spines caught on a fish hook.