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
Ulukau: The Hawaiian Electronic Library make these sources available for educational and scholarly work. The collaboration between Ho‘olaupa‘i, Hale Kaumo‘o and Alu Like contain the largest collection of digitized native language newspapers in the Pacific with nearly 125,000 pages accessible within Ulukau. The library's digital dictionary, is "Nā Puke Wehewehe ‘Ōlelo Hawai‘i". In the Hawaiian language the term "Puke Wehewehe ‘Ōlelo" means "dictionary". Photographer Ed Greevy, who helped illustrate several books including: ""A Nation Rising: Hawaiian Movements for Life, Land, and Sovereignty"", has donated a good deal of his work to the Hawaiian electronic library. Ulukau: The Hawaiian Electronic Library Ulukau: The Hawaiian Electronic Library