lol twas my first time snorkeling. To my understanding the Hawaiian islands are located much farther north then most and are some of the youngest when compared to those of the southpacific and elsewhere. Also the places I snorkeled were very close to shore> runoff, dirt, silt, ect. In deeper water where I did not go, there was much more reef development. There were some very nice looking procilipora/monipora corlas that were pink purple.