By Mongabay.com Happy World Octopus Day! Every Oct 8, the world celebrates one of the more unusual creatures of the sea.

Finned octopus species alive today are all small, deep-sea animals that mostly live in pitch-black darkness thousands of meters beneath the surface of the sea. But a new discovery by a team of ...

Giant octopuses measuring up to 62 feet (19 meters) in length were among the top ocean predators around 100 million years ago, according to new research that uncovered rare fossils hidden within solid ...

The top predator prowling the seas during the age of the dinosaurs 100 million years ago may have been the octopus. New analyses of fossilized jaws reveal that massive, kraken-like octopuses once ...

At the time of the dinosaurs, the oceans were teeming with life. Below the waves, giant marine reptiles, such as the fearsome 4m (13ft) long mosasaurs, were the undisputed apex predators. In artistic ...

The coconut octopus has solved a problem that stumps most soft-bodied ocean creatures: how to survive on a wide-open, featureless seafloor teeming with predators. Its solution involves tools, forward ...

The female blanket octopus can weigh 40,000 times more than males, and can use the dangerous Portuguese man-o-war's tentacles ...

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

Close-up of a Coconut Octopus (Amphioctopus marginatus, aka Veined Octopus) on the Go, Carrying a Shell over the Sandy Bottom. Ambon, Indonesia© Daniel Lamborn/Shutterstock.com Octopuses are masters ...