A "kraken-like" giant octopus might have been one of the most formidable predators around 100 million years ago, scientists ...

Massive octopuses, some as long as 62 feet, once roamed the oceans during the time of the dinosaurs. New fossil discoveries ...

Most octopus bodies don't fossilize - but their rock-hard beaks survived long enough to reveal something extraordinary.

Unlike most of its invertebrate peers, octopuses gave up protective shells... But it seems that the sacrifice was totally ...

New fossil evidence suggests a massive octopus may have been the true apex predator of the dinosaur-era seas, challenging ...

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A distinct striped pattern on a species of octopus varies from one individual to the next, which could help researchers monitor the rare animal. Pygmy zebra octopuses (Octopus chierchiae), also known ...

Camouflage isn't the only way cephalopods have evolved to change their appearance. Octopuses and other cephalopods make the fastest transformations in the animal kingdom. Here, a giant Pacific octopus ...

Blanket octopus pairs are some of the undersea world’s oddest couples. What’s so startling is the size difference: Males are about the size of a walnut—less than an inch long—but some females can ...