Three divers looking at a Giant Pacific Octopus (Enteroctopus dofleini) in the Sea of Japan. Octopuses are iconic for their eight arms. But how many hearts does an octopus have? It turns out that an ...

Octopuses are undeniably fascinating creatures. As one of the most intelligent species of invertebrate, the octopus is ...

Most carnivores have teeth to grasp and eat prey, so marine animals with teeth are not uncommon. Sharks, dolphins, eels, whales, many fish species, and marine mammals like seals and sea lions have ...

Consider the octopus. Smart and sophisticated, it has a brain larger than that of any other invertebrate. With 500 million or so neurons, its nervous system is more typical of animals with a backbone.

Octopus mothers slam themselves against rocks and eat their own arms before their eggs hatch. Scientists have discovered what leads to the self-destruction.

Dive into the enchanting world of the octopus, an extraordinary marine wonder with eight flexible arms and a unique ...

With its eight legs wrapped around itself as if in a hug and its eye pupils narrowed to a slit, the octopus breathes evenly, its body a uniform whitish gray. Moments later it begins to change color -- ...

Octopuses can be fooled into thinking a fake arm is actually their own. When scientists in Japan pinched an artificial appendage during experiments, octopuses recoiled in defense – swimming away, ...

Blending in with your surroundings is a crucial (and fascinating) skill in the animal kingdom, which is why many animals can change colors on demand. Chameleons, seahorses, and octopuses can all do it ...

Forbes contributors publish independent expert analyses and insights. GrrlScientist writes about evolution, ecology, behavior and health. You might not realize this, but quickly changing colors, as ...

If you’re lucky enough to see a shallow-water octopus bedding down in a craggy nook off the coast of Okinawa Island — and you have the patience to wait about an hour after it falls asleep — you might ...