Glow-in-the-Dark Sharks | Shark Week 2015

The bioluminescent lanternshark has spines that light up to warn predators, and uses light to make itself almost completely invisible, while the viper shark uses light to attract prey. From Shark Week 2015's “Alien Sharks: Close Encounters,“ airing MONDAY, JULY 6 at 10/9c on Discovery! | Subscribe to Discovery: Can't get enough sharks? Visit the Discovery Sharkopedia to learn more about thes