They change shape and color, and squirt ink. But they also will return your gaze, "as if they're scrutinizing you." ...

Octopuses are among the most neurologically complex invertebrates, famed for their extraordinary dexterity. Their eight arms allow them to capture hidden prey, communicate, explore, and even mate ...

Argonaut octopuses are rarely seen by humans, as they live in the open ocean away from shores. Females have a thin shell that carries their eggs, giving them the nickname 'paper nautilus.' Males have ...

CHICAGO — A deep-sea robot gliding over the ocean floor near the Galápagos Islands captured footage of something researchers had never seen before: a tiny, vivid blue octopus no bigger than a golf ...