Hawaiian Trough the Hawaiian Arch. The Hawaiian Arch extends about 200 meters above the surrounding ocean floor, and contains tilted coral reefs. The coral reefs in the Hawaiian Tough are described as mesophotic coral ecosystems, which can be found between 100 and 500 feet below sea level. 43 percent of fish species documented at the mesophotic reefs are unique to the Hawaiian Islands. At Maui’s ‘Au’au channel the largest uninterrupted mesophotic coral ecosystem was discovered, with an area larger than 3 square miles. These reefs contained many stony, reef building coral that belong to the genus Leptoseris, which are adapted for deep
Hawaiian coot of the species had been meet. The delisting/downlisting criteria include protection and management of core and supporting wetlands, a population size greater than 2000 birds for five consecutive years, and multiple self-sustaining populations throughout the Hawaiian Islands. The first reference to a coot in the Hawaiian Islands was by Andrew Bloxam, who encountered the Hawaiian coot but failed to collect a specimen as he mistook it for the Eurasian coot, "Fulica atra", while in the islands in 1825 as the naturalist on board the HMS "Blonde". It is now considered either to be a separate species, "Fulica alai", or a