When it’s fully grown, this Caribbean pygmy octopus will be just the size of a silver dollar. As a hatchling, it’s dwarfed by a penny. The Aquarium at Mote Marine Laboratory in Sarasota, Florida, ...

Filmed deep off California, a rarely seen seven-arm octopus emerges from ocean darkness, revealing surprising size, unusual feeding habits, and how much of the deep sea remains unexplored by ...

The blue ring octopus is a small animal with a lethal secret. Though small, this poisonous creature carries a powerful toxin ...

Wait, I thought every day was octopus day. Oh well. An eight-armed hug for everyone! My favorite species is the Giant Pacific Octopus. Learn more about them in this video from the National Aquarium.