In the deep, dark ocean where no light can reach, many organisms make their own light.
It turns out that bioluminescence, the production and emission of light by a living organism, is quite common in the oceans. All kinds of animals, from bacteria to sharks, use it to warn or evade predators, to lure prey, or for communication.
Marine biologist Edith Widder was one of the first people to film bioluminescent below the surface. In the following 2011 TED Talk, The Weird, Wonderful World of Bioluminescence, she discusses her studies and shares some amazing footage of glowing sea creatures. Check it out:
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