Black Longspine Urchin - Diadema setosum

"Diadema setosum" is a species of long-spined sea urchin belonging to the family Diadematidae. It is a typical sea urchin, with extremely long, hollow spines that are mildly venomous. "D. setosum" differs from other "Diadema" with five, characteristic white dots that can be found on its body.