Description Arbacia crassispina, aboral view. Tristan de Cunha main Island (tide pools), Central South Atlantic.Author Coppard, SimonJPG file - 50.60 kB - 443 x 480 pixelsadded on 2018-07-08440 viewsEchinoidea taxaDigital photo, entire speciesArbacia dufresnii (Blainville, 1825)checked Kroh, Andreas 2018-07-23 This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License