The complex biology of an octopus shines through as a brief snippet displays its unique ability to camouflage in water.

That's the reality for those unlucky enough to be bitten by a blue-ringed octopus. Initially its bite is painless. But quickly the fast-acting toxin goes to work, paralysing its target.

An octopus scoots along the reef during one of Anne Rillero’s Sunday swims off the Makena coast. A friend, Don Bloom, dove down to snap a photo. DON BLOOM photo At the Maui Ocean Center ...