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

See how Australia's grasslands harbor animals worth worrying about, especially the venomous reptiles that slither among 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.