On Mytilus Seamount, a bamboo coral is attached to the black basalt rock formed by a now-extinct undersea volcano. The yellow animals on the coral are crinoids, or sea lilies, in the same major group of animals as sea stars. The summit of Mytilus Seamount is 8,800 ft below the surface of the ocean. Photo: NOAA Okeanos Explorer Program, 2013 Northeast U.S. Canyons Expedition Science Team