54. Octlantis

About eight years ago now, my friend Matt Lawrence discovered the site we call “Octopolis,” and since then it’s been an important part of my underwater explorations and a regular feature on this website. Octopolis, as the name suggests, is notable for its high density of octopuses – there can be up to 16 present in a small area, though more often it’s half a dozen or so. The occupied area is roughly centered on what looks like an old human-made object, perhaps dropped off a boat many years a...