The discovery of a blue-ringed octopus at a Mandurah beach this week has got people talking on social media.
The octopus was found at Doddis beach on Thursday.
According to the WA Museum the octopuses have a distinct pattern of bright blue rings on their bodies and they produce a venomous saliva that can potentially kill an adult.
People are warned to stay away if they spot one.
The blue-ringed octopus species that live in tide pools and coral reefs in the Pacific and Indian Oceans, from Japan to Australia (mainly around southern New South Wales and South Australia, and northern Western Australia) are recognised as some of the world's most dangerous marine animals.
They hunt small crabs, hermit crabs, and shrimp, and may bite attackers, including humans, if provoked.