The blue-ringed octopus looks tiny and harmless, but beware. Its poison is deadly. The bright blue circles that appear on its body when it feels threatened are a warning sign to any living thing nearby. Get any closer and it will bite!

Australia's Remarkable Wildlife
Australia has been an island continent surrounded by oceans for millions of years. During this long, long time, its animals have evolved into species that are unique and precious. Covered with feathers, fur, spikes or scales, Australia’s wild creatures can be beautiful, frightening and even dangerous. Find out about Australia’s remarkable wildlife in this series and appreciate them in a whole new way.