Does light attract sharks? Light is a very important thing. For all animals that possess the sense of sight, light helps us interpret the world visually. Depending on how light reflects off an object, it’s revealed as smooth or rough, large or tiny, friend or foe. This holds true not just for us land-based animals, but for those that live under the sea as well. Some marine life emits a healthy blue-green glow called bioluminescence. This biological phenomenon has been shown to ward off predators, attract prey and allow the glowing organism to see. Some bioluminescent algae glow when they become agitated [source: Scripps Institution of Oceanography]. In the mid-1990s, resea