Scientists have discovered Octlantis- an underwater site built entirely by octopuses where they communicate with each other by posturing chasing or colour changes.
Researchers from university of Illinois in the US found the site in the waters off the east coast of Australia.
It is the second gloomy Octopus settlement found in the area and the first gloomy octopus site was found in Jarvis Bay off the east coast of Australia in 2009.