Video and images show for the first time a record of octopus cannibalism, revealing the common octopus in three encounters cannibalizing a smaller octopus in the Atlantic Ocean off Spain.
A scuba diver captured a video of a brief tussle between a rare giant octopus and his diving partner.
To learn more about the smartest invertebrates on Earth, LiveScience caught up with Katherine Harmon Courage to talk about her new book "Octopus! The Most Mysterious Creature In the Sea."
Instead of changing their genes, octopi 'edit' their RNA intermediates to survive in colder waters.
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