See how the blue-ringed octopus warns predators away—and paralyzes prey. | National Geographic

Blue-ringed octopuses have a beak-like mouth with a radula for feeding. They inject their venom through a sharp, parrot-like beak located in the center of their tentacles. #octopus #ocean #travel | Critter Hunter

The glow of a blue-ringed octopus comes from their iridophores, light-reflecting structures arranged to shimmer blue when the muscles above them relax. 🌟 📺: Australian Geographic Extraordinary Animals now streaming for free via SBS On Demand #ausgeo #blueringedoctopus #octopus #deadlyanimals #marine #underwater | Australian Geographic