We are glad to be the first in Kalymnos Island Greece who find Diadema setosum. The first invasive Erythrean (Red Sea) sea urchin in the Mediterranean.
People confuse Diadema setosum with Centrostephanus longispinus. Another "long spined sea urchin" which is native in Greece, rare and threatened specie. Compare the 2 species at [ Ссылка ]
