Octopus brains may have grown smart from an enormous diversity of microRNAs that let them grow multiple types of brain cells.

Genetic analysis of octopuses identified DNA sequences in their brains called transposons, which may help regulate learning.

Watch debris from the sea bottom fly, as octopuses hurl sand and other projectiles at their neighbors in an Australian bay.

The Bering Sea's snow crab population has been in decline over the last five years, but this season the population has collapsed.

Thousands of cannonball jellyfish washed ashore along North Carolina beaches during a red drum spawning event.

The colorful and aggressive mantis shrimp evolved a new way to use a naturally occurring, biological sunscreen: The animals use this compound to filter light from their eyes.

The species is named after the HMS Beagle.

A new study reveals that octopuses frequently communicate with each other in challenging displays that include posturing and changing color.

Octopuses are highly intelligent, and thanks to their amazing, neuron-filled tentacles, they can do humanlike tasks such as unscrewing jars and lids.