The blue-ringed octopus is the only octopus to have a lethal toxin that can kill humans. Read here to learn about potential ...

Blue-ringed octopus found at Callan Park in Sydney Animal is one of world's most deadly sea creatures READ MORE: Dad paralysed after octopus bite at Balmoral Beach A deadly blue-ringed has been ...

This is the terrifying moment tourists unknowingly handled a highly venomous blue-ringed octopus. Holidaymaker Regine Niepes and her friends spotted the deadly cephalopod and picked it up from the ...

When they're alarmed, blue-lined octopuses display iridescent blue rings on their arms to ward off approaching predators. Totti via Wikimedia Commons under CC BY-SA 4.0 Animals have evolved many ...

Along the rocky shores of eastern Australia, a small brown octopus is unassuming as it blends in with its surroundings. When the octopus is scared or hungry, however, it becomes one of the most ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Go diving into the intertidal waters of the Great Barrier ...