A photographer finds a rare orange octopus on a beach, after a surprising increase in their numbers in the area.

A video of an octopus changing colors while it sleeps is raising a lot of questions about the mysterious sea creatures. The footage aired in the new PBS documentary titled "Octopus: Making Contact." ...

Octopuses change color to camouflage themselves from predators such as stingrays and eels. Octopuses have even been observed changing color in their sleep. Octopus's color-changing ability is known as ...

*Refers to the latest 2 years of stltoday.com stories. Cancel anytime. Octopuses switch between active and quiet sleep just as humans switch between deep sleep and REM sleep, a new study has revealed.

Photographer Gareth Davies saw the cephalopod as he went for a seaside walk.