Kids’ books about sea creatures, from irukandji to octopus to wobbegong Pastimes for fans who prefer ocean adventures away from a hot beach: Caroline Luzzatto recommends.

An octopus swims at the Ocearium in Le Croisic, western France, on December 6, 2016. (Photo by LOIC VENANCE / AFP) (Photo credit should read LOIC VENANCE/AFP/Getty Images) Octopuses have three hearts.

8 fascinating facts about octopuses—from their supersmarts to their favorite foods. Our photographer got an exclusive look at how researchers are learning more about these cephalopods—and how ...

It may come as a surprise that octopuses have more brain cells than humans do — or maybe not. Illustrator Maja Säfström shares 10 completely odd animal facts.

The octopus is one of the coolest animals in the sea. For starters, they are invertebrates.That means they don’t have backbones like humans, lions, turtles, and birds. That may sound unusual ...

3. THEY LOVE PLAYING WITH TOYS. We wrote about the time an octopus broke into a library to read some books. They’ve also been known to play with rubber duckies, LEGOs, and even a diver’s ...

Next on the “amaze-o-meter” of octopus facts is their unreal ability to camouflage themselves. Unlike most species who maintain a static appearance, using their basic coloring or overall shape ...

How many brains does an octopus have? Octopuses have nine brains . Each of their eight arms contains its own small brain, allowing the arms to act independently and complete tasks efficiently.