Mum warns others of deadly find in Sydney rockpool

A Sydney mum and her son have had a near miss with a highly venomous sea creature in a rockpool, warning others of the find.

A mum has shared a snap of a blue ringed octopus she spotted on her son’s foot while he swam in a rockpool.

Emily Harris caught sight of the highly venomous creature at Fairlight Beach rockpool in Sydney’s Northern Beaches.

“Just a reminder to check rockpools when kids are playing in them,” she wrote.

“This guy was climbing on my son’s foot today at Fairlight (lots of little kids.)”

Emily Harris shared a snap of the blue-ringed octopus. Picture: Emily Harris/Facebook.

The blue-ringed octopus is one of the most venomous sea creatures in the world, with enough venom to kill 26 adults within minutes.

At a small size of four to six centimetres long, their bites are tiny and often painless - but the venom is capable of causing respiratory arrest, heart failure, blindness, paralysis and eventually death from suffocation.

“It was brown, until it became agitated – and then bright purple rings. And angry!” the mum continued.

The blue-ringed octopus is one of the most venomous sea creatures in the world, with enough venom to kill 26 adults within minutes.

The venomous animal is relatively docile, showing their bright rings only when threatened, becoming increasingly dangerous for humans.

Blue-ringed octopus can typically be found across the east coast of Australia and throughout Sydney Harbour.