Scientists confirmed the golf ball-sized octopus is a new species a decade after its first sighting on a deep-sea expedition. CHICAGO — A deep-sea robot gliding over the ocean floor near the Galápagos Islands captured footage of something researchers had never seen before: a tiny, vivid blue octopus no bigger than a golf ball. Now, a decade after that first sighting, scientists have officially confirmed it is a species new to science. The octopus was first spotted in 2015 during an expedition aboard the E/V Nautilus, conducted in partnership with the Charles Darwin Foundation and the Galápagos National Park Directorate.…