Description An Aspidodiadema arcitum seen off Hawaii by NOAA Okeanos Explorer mission.JPG file - 141.29 kB - 800 x 450 pixelsadded on 2018-09-08567 viewsEchinoidea taxaDigital photo, entire speciesAspidodiadema arcitum Mortensen, 1939checked Kroh, Andreas 2018-09-10 This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License