Biologists just discovered an underwater octopus city -- they call it Octlantis

Researchers were thrilled to discover the aquatic architecture, which is reminiscent of human cities. But in a city filled with cannibal cephalopods, life is not a walk in the park. Gloomy octopus. Photo credits: Peter Godfrey-Smith. The octopus has long been regarded as an intelligent yet solitary creature. Gloomy octopuses (octopus tetricus) especially, were thought to…