Keywords: Cidaroid sea urchin in Marianas deep waters.jpg Cidaroida seen by NOAA Okeanos Explorer in deep sea close to the Marianas Islands 2016-06-20 17 18 03 http //oceanexplorer noaa gov/okeanos/media/exstream/exstream_02 html NOAA Okeanos Explorer other versions PD-USGov Unidentified Cidaroida NOAA pictures uploaded by FredD Okeanos Explorer |