Plunge into this deep blue hole and you'll ... You'll likely spot marine life lining the coral wall at the surface of the hole. As you descend about 410 feet below sea level, you'll discover ...

According to the National Oceanic and Atmospheric Administration’s study of Hawaii’s deep-sea coral ... Maui’s crystal blue waters are home to several world-renowned coral reefs.

In contrast to shallow coral reefs, the researchers point out that deep-sea reefs are poorly studied ... found species as having a pale, ghostly blue underside with a white top.

They were covered by deep sea animals, including barnacles, brittle stars and predatory worms. To the team's surprise they found some species of coral had settled onto the buoys, including several ...

they are also the canaries of the sea, being very sensitive to small changes in the chemical and physical condition of their environment. Modern coral reefs — whether deep or shallow — are ...