The greater blue-ringed octopus (Hapalochlaena lunulata ... Blue-ringed octopuses are incredibly beautiful animals, especially when they show off their bright patterns. But despite their small size ...

The animal is one of four species of the extremely venomous blue-ringed octopus and is known as a blue-lined octopus due to its non-circular markings. Blue-lined octopuses (Hapalochlaena fasciata ...

The colorful blue rings of the octopus flash as a signal, but it may already be too late by then. This little predator is a ...