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The government agency that manages Australia's Great Barrier Reef on Friday downgraded its outlook for the condition of the coral system from "poor" to "very poor."
EcoWatch Daily Newsletter
By Tara Lohan
Visitors walk slowly through a room of dimmed lights and glowing tanks that bring the mysteries of the sea into plain view. The Steinhart Aquarium at the California Academy of Sciences in San Francisco is home to 900 different species — everything from brightly colored reef fish to prickly sea urchins, even an albino alligator named Claude.
mevans / E+ / Getty Images
Marine biologists are dealing with a mystery. What's killing the coral reefs in the Caribbean?
Light pollution is increasing near coral reefs as coastal developments expand. Some bungalows are even built above the reef with clear floors, so that tourists can watch the fish at night. But that means the fish can see the light from the bungalows, too.
By Cody Clements
Coral reefs are home to so many species that they often are called "the rainforests of the seas." Today they face a daunting range of threats, including ocean warming and acidification, overfishing and pollution. Worldwide, more than one-third of all coral species are at risk of extinction.
Saturday, June 8 is World Oceans Day, a chance to honor and celebrate our blue planet. Ocean lovers around the world will attend beach cleanings and other events or join a March for the Ocean to call for an end to activities that harm marine life, like offshore oil drilling and plastic pollution.