Keywords: Histocidaris variabilis.jpg fr A deep-sea sea urchin Histocidaris variabilis seen off Hawaii by NOAA Okeanos Explorer mission 2015-09-29 http //echinoblog blogspot fr/2015/09/know-your-deep-sea-urchins-okeanos html NOAA Okeanos Explorer other versions PD-USGov NOAA pictures uploaded by FredD Uploaded with UploadWizard Histocidaris variabilis |