> the article never mentioned in what way the site is "engineered" Yes, it did: "octopuses who had been inhabiting the area had built up piles of shells left

> the article never mentioned in what way the site is "engineered" Yes, it did: "octopuses who had been inhabiting the area had built up piles of shells left over from creatures they ate, most notably clams and scallops. These shell piles, or middens, were further sculpted to create dens, making these octopuses true environmental engineers."