Just when you thought octopuses couldn’t get any weirder: It turns out that their suckers have an unexpectedly hairy grip. Octopuses can form an impressively tight grip—even on a rough surface.
Like a starfish, an octopus can regrow lost arms. Unlike a starfish, a severed octopus arm does not regrow another octopus. But the biological secrets inside their arm regeneration feat do hold the promise of learning more about how we might better regenerate our own diseased or lost tissue.
The eight wily arms of an octopus can help the animal catch dinner, open a jar and even complete a convincing disguise. But these arms are not entirely under the control of the octopus’s brain.
An octopus might be one of the most intelligent invertebrates, but it doesn’t always know what, exactly, its arms are doing. How these animals manage to avoid tangling themselves up is a major feat.