127K views · 9.1K reactions | 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 | Facebook

14K views · 654 reactions | Have you ever seen a blue-ringed octopus while diving?  Despite their innocent appearance, they are among the most venomous marine species on the planet.   IG user 'kenzokiren' Lembeh, Indonesia | PADI | Facebook

Here's an amazing up close look at the famed blue-ringed octopus! Is this on your to-see list? 📷: @julia.waterchild (IG) | SSI

16K views · 433 reactions | 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 | Facebook