It's not all that unusual to see octopus on a restaurant menu. But an octopus as a family pet? Cameron Clifford of Edmond, Okla. says his 9-year-old son Cal is a huge fan of the eight-legged creatures ...

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, but ...

With their quick-change camouflage and high level of intelligence, it’s not surprising that the public and scientific experts alike are fascinated by octopuses. Their abilities to recognize faces, ...