The Blue Ringed Octopus, Hapalochlaena maculosa, is one of the deadliest creatures in the sea with a venomous bite that can kill a human.

Normally they are not seen during the day so a night dive under Edithburgh Jetty is a good way to find one if you really want to.

On this particular dive I counted four out hunting in the rubble and curiously they all had their famous blue rings subdued to gentle blue flecks.
Normally very timid they did not seem the slightest bit perturbed by my lights and camera as they went about their business hunting.

It was common to see as in this case two front legs extended as they waited to ambush some unsuspecting passerby.

Photo: Robert Rath, ‘Bluey’ 1/100s f/20 ISO160 100mm