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Daily migration

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Many twilight zone organisms participate in the largest migration on the planet. It happens around the globe, every day, sweeping across the world’s oceans in a massive, living wave. Every night, a multitude of fish, squid, plankton, and other mid-ocean dwellers begin their journey up to surface waters to feed. By daybreak, they will be gone again, headed back to the relative safety of deeper, darker waters. © Woods Hole Oceanographic Institution, Natalie Renier, WHOI Creative

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