A real-life "Octomom" off the coast of California has been declared a champion of parenting in the animal world. Scientists watched as she shielded her eggs for a record 4.5 years.

Scientists are unveiling a rare Pacific octopus with a taste for eating its partners during sex

Octopuses move with a simple elegance, but they have no rhythm, according to new research.

Thanks to their keen night vision, cuttlefish can camouflage themselves against nocturnal predators in the briny deep.

While most female squid and octopuses have just one reproductive cycle before they die, vampire squid go through dozens of egg-making cycles in their lifetimes, a study found.

Antarctic octopuses survive subzero temperatures because of the blue pigments in their blood, a new study finds.

A fossil crab was discovered perfectly preserved in Burmese amber.

Cameras on drones recently captured aerial images of nomad jellyfish as they swarmed by the thousands in coastal waters near Israel.

Octopus mothers slam themselves against rocks and eat their own arms before their eggs hatch. Scientists have discovered what leads to the self-destruction.