Uncommon to begin with, and nocturnal as well, the Striated Star (Valvaster striatus) is rarely seen. It carries tiny pincer-like organs (pedicillariae) on its surface, which you can see if you look very carefully at this photo.

This sea star was photographed at night in about 35 feet of water off the south Kohala Coast near the Mauna Lani Resort on the Big Island of Hawaii.