Fish species unique to Hawaii dominate deep coral reefs in Northwestern Hawaiian Islands

Deep coral reefs in Papahanaumokakea Marine National Monument may contain the highest percentage of fish species found nowhere else on Earth, according to a study. In waters 100-300 feet deep, nearly 50 percent of fish observed over a two-year period were unique to Hawaii -- higher than any other marine ecosystem. The study also found that on some deeper reefs, more than 90 percent were endemic.

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