01/21/2026
Scientists recently found a place they call Octlantis off the coast of Australia. It looks like an underwater city because many octopuses live close together in one area. Instead of roaming alone, these octopuses dig and arrange dens on the seabed, creating a kind of neighborhood with many little homes.
At Octlantis, octopuses gather sand, shells, and rocks to build or improve their dens. They move things around, carry shells, and tuck themselves into holes and crevices. The homes sit near each other, and researchers using cameras saw octopuses visiting neighbors, exploring nearby dens, or resting close by. This kind of close living is surprising because octopuses were long thought to be mostly solitary animals.
The site shows clear social behavior: they share space, interact, and sometimes react to one another’s presence. Studying Octlantis helps scientists understand how smart and flexible octopuses can be and how they cope living together. Finding places like this is exciting because it shows the ocean still holds many surprises, and it reminds us to protect these special marine neighborhoods for the future.