National Geographic releases a new docuseries, "Secrets of the Octopus," revealing that the creatures are more human-like than we think.

This female common octopus, when offered a box containing a clam, an anchovy, and a mussel, went for the anchovy every time.

The Dumbo octopus is known as the cutest octopus in the world because of its pudgy shape and fins that look like gigantic ...

Meet the world's largest octopus, which can tip the scales at over 600 pounds. Hear about the amazing feats of these highly ...

An octopus at New Zealand's National Aquarium made a break for freedom by slipping out of its tank, slithering down a drainpipe and escaping into the ocean earlier this year. Inky, a male common ...