Scientists discover hidden world of Hawaii's coral 'twilight zone'

20-year study of deep reefs finds algae meadows and swaths of continuous coral with the highest rate of species found nowhere else in Earth’s seasThe “twilight zone” of Hawaii’s deep coral reefs are home to vast algae meadows and support the highest rates of species found nowhere else in Earth’s seas, scientists have discovered.A 20-year study of the archipelago’s poorly-explored mesophotic – middle light – coral zone also found the deep-reef habit