Which of these octopuses are highly venomous?

Octopi are incredibly smart. They can figure out how to twist open a jar lid by wrapping their body around it & rotating. They are also amazing escape artists. They can get through the smallest openings or cracks. Find a book or video about them. You will be astounded.

I love it when the three other answers are described.

Sonicgirl, The blue ringed ones are deadly here in Australia as young children are attracted to them when they find them in rock pools.

Fascinating linfo. Thanks again. Love this game.

My Octopus Teacher great program on Netflix. Beautifully shot.

Apparently the red Scorpo-Octopus of southeast asia weighs anything up to 60lbs , It's beak can go through Aluminium.

Hank, "Octopuses", it's Greek, not Latin.

Player Elf Counsel, Good

That was really fascinating 😄

I didn't know any species other than the pufferfish excreted tetrodetoxin. This was news to me.

I believe the correct plural of octopus is octopi

Auanla gioi thong minh

Pufferfish also carry tetrodotoxin.

SaltyWillOWisp96651, yess OCTOPI! pdf.. octopuses

yeah well at least I knew this one?!

In a nutShell.., what you are describing are not Blue-ringed Octopus, but Blue Bottles (a jellyfish like colony of polyps ) The Blue-ringed Octopus lives in rocks around the coastline and almost never washes up on the beaches. Also their bite is nearly always painless, as their venom contains a powerful numbing agent.

Player Elf Counsel, MI