Based on their research on reef fishes, the Smithsonian researchers and co-author Luke Tornabene (assistant professor at the University of Washington and former Smithsonian post-doctoral fellow) present a new classification of coral - reef faunal zones:
Rariphotic (low light): Newly discovered faunal zone from 130 - 300 meters (400 - 1,000 feet), below the reef - building coral zone, and as deep as Curasub can go.