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The mystery of the largest light in the sea

A quarter-mile below the ocean’s surface, in the borderless realm of the midwater, two blue-green orbs illuminate the inky black. They glow for a few seconds then disappear. These orbs belong to Taningia Danae, a species of deep-sea squid that can grow to more than seven feet in length and weigh more than 130 pounds. Also known as the Dana Octopus Squid, these animals glide through the depths on a pair of huge muscular fins that unfurl from their maroon-coloured body, or “mantle.”