Author: Crystal Gammon
Source: Our Amazing Planet 
July 30, 2012
"When you think of coral reefs, you probably picture scuba divers gliding through warm, crystal-clear waters. And for the most part, you'd be right: more than 90 percent of the world's coral reefs are located in the tropics.
Now researchers in Japan have found what is — so far — the world's northernmost coral reef. Located off the coast of Tsushima Island at 34 degrees north latitude, the newly discovered reef is far different from other coral reefs and is 217 miles (350 kilometers) north of most others in the region.
"Coral reefs have been believed to develop under warm-water settings — at least 18 degrees Celsius [64 degrees Fahrenheit] in winter. This setting is 13 degrees Celsius in winter [55 degrees Fahrenheit], which is unbelievably low," Hiroya Yamano, a researcher at Japan's National Institute for Environmental Studies, told OurAmazingPlanet. "The species, and thus seascape, is completely different from normal reefs."
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