Coral reefs are home to a wide variety of marine life. Some of the animals that live near coral reefs can glow in the dark, but so can many species of corals themselves! Corals use their ability to glow as a kind of sunscreen, and it can even be used to feed creatures that live on coral reefs. How do corals glow? Readers discover the answer to that question through informative text, including fact boxes. Colorful photographs of corals keep readers engaged as they learn about these amazing animals.