The idea of undiscovered underwater cities isn’t as far-fetched as you might think. It just turns out they’re built by octopuses.
Earlier this month, scientists published a paper describing a site in Australia’s Jervis Bay, near Sydney, where 10 to 15 gloomy octopuses (yes, that’s really what they’re called) live at “high density” and exhibit “complex social interactions” towards one another. The species, also known as Octopus tetricus, communicate, fight and even “evict” one another from their dens in a settlement formed around exposed rock patches.
In other words, it’s basically an octopus city, which biologists are calling “Octlantis,” according to The Guardian.