Octopuses are amazing sea creatures. They belong to a group called molluscs, just like snails and clams. But unlike them, octopuses have no shell. They have soft bodies, eight arms, and big brains.

This is a small octopus, hidden between rocks. They range in size. The largest octopus, North Pacific Octopus, can grow over 30 feet. And the smallest octopus, Californian, can be less than an inch.

Although giant Pacific octopuses are masters of disguise, the new octopus at the National Zoo revealed its true identity Saturday when a keeper helped it select its name: Pandora. The octopus had a ...