National Aquarium - The greater blue-ringed octopus is only about 4 inches across, but it holds enough venom to kill as many as 26 people... within minutes. Look, but definitely don't touch.
![Greater Blue-Ringed Octopus - Hapalochlaena lunulata - Lembeh Strait, Indonesia - Photo 2 - Tropical Reefs Greater Blue-Ringed Octopus - Hapalochlaena lunulata - Lembeh Strait, Indonesia - Photo 2 - Tropical Reefs](https://reefguide.org/pix/greaterblueringedoctopus2.jpg)
Greater Blue-Ringed Octopus - Hapalochlaena lunulata - Lembeh Strait, Indonesia - Photo 2 - Tropical Reefs
![Greater blue-ringed octopus | Churaumi Fish Encyclopedia | Okinawa Churaumi Aquarium - For the next generation to inherit; the beautiful seas of Okinawa. - Greater blue-ringed octopus | Churaumi Fish Encyclopedia | Okinawa Churaumi Aquarium - For the next generation to inherit; the beautiful seas of Okinawa. -](https://churaumi.okinawa/userfiles/fish_images/sanngo_musekitsui/oomarumonndako4.jpg)