A seven-arm octopus was spotted in Monterey Bay in Nov. 6, 2025; the 'rarely seen' deep-sea octopus was spotted by researchers who've only seen it four times in nearly four decades.

A deep-sea octopus nursery, just the third known to exist, has been discovered off the coast of Costa Rica, according to the Schmidt Ocean Institute. Scientists were able to see an active octopus ...

Scientists have discovered at least four new species of octopus in the deep waters of a 100-square-mile area near Costa Rica, officials from the Schmidt Ocean Institute said on Tuesday. An ...

Marine scientists found a previously unknown octopus nursery in a discovery that could help lead to greater protection for the surrounding area off the Costa Rican coast. “The discovery of a new ...

Unprecedented numbers of the common octopus have been found in British waters this year, but what’s behind the rare ‘bloom’? View on euronews ...

WASHINGTON (AP) — Most octopuses lead solitary lives. So scientists were startled to find thousands of octopus huddled together, protecting their eggs at the bottom of the ocean off the central ...

Deep under the sea, a real-life master of disguise lies in wait — take a look at the Mimic Octopus (Thaumoctopus mimicus), nature's ultimate chameleon. It can change shape to resemble many sea ...