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.
![Blue Ringed Octopus on Reeftop in Lembeh Strait, Indonesia Stock Photo - Image of nature, animal: 133773620 Blue Ringed Octopus on Reeftop in Lembeh Strait, Indonesia Stock Photo - Image of nature, animal: 133773620](https://thumbs.dreamstime.com/z/blue-ringed-octopus-reeftop-lembeh-strait-indonesia-greater-blue-ringed-octopus-hapalochlaena-lunulata-reeftop-lembeh-133773620.jpg)
Blue Ringed Octopus on Reeftop in Lembeh Strait, Indonesia Stock Photo - Image of nature, animal: 133773620
![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)