Stalked crinoids (sea lilies) cling to the steep, basaltic (volcanic rock) terrain at Ruby volcano. These crinoids can slowly crawl around on the rocks, but cannot swim. Image courtesy of Submarine Ring of Fire 2006 Exploration, NOAA Vents Program
Stalked crinoids (sea lilies) cling to the steep, basaltic (volcanic rock) terrain at Ruby volcano. These crinoids can slowly crawl around on the rocks, but cannot swim. Image courtesy of Submarine Ring of Fire 2006 Exploration, NOAA Vents Program