It can appear harmless on the surface, yet the blue-ringed octopus is actually one of the most venomous sea creatures. Its bright blue rings and changing yellow colour are a warning sign that it gives ...

Quick Take The blue-ringed octopus has extremely potent venom, capable of killing a human victim. These octopuses contain a neurotoxin known as tetrodotoxin, one of the strongest toxins in marine ...

The blue-lined octopus (Hapalochlaena fasciata) is only a few centimeters long, yet it may be one of the most dangerous marine animals on Earth. That's because, as part of the blue-ringed octopus ...

ENOSHIMA, Japan As snack bars start to reopen and windsurfers drift back to this popular beach town south of Tokyo, few denizens are aware that they're sharing real estate with one of the most lethal ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Go diving into the intertidal waters of the Great Barrier ...

The Blue-lined Octopus is a species of octopus famous for its highly toxic tetrodotoxin, and inhabits the shallow waters and coral reefs of the Western Pacific Ocean from the Ogasawara Islands and the ...