With a split-second muscle contraction, the greater blue-ringed octopus can change the size and color of the namesake patterns on its skin for purposes of deception, camouflage and signaling.

Irvine, Calif., Jan 4, 2024 — With a split-second muscle contraction, the greater blue-ringed octopus can change the size and color of the namesake patterns on its skin for purposes of deception, ...

Mat Rogerson found a deadly blue-ringed octopus on his snorkeling gear in Australia, according to a Facebook post. Screengrab from Facebook Mat Rogerson regularly goes snorkeling off the coast of ...