a black long spine urchin diadema setosum resting on bottom of seabed rock. its body is full of extremely long, hollow black ven

animal aquarium aquatic background biology black body bottom color coral creature dangerous diadema dive echinoderm exotic extremely fauna floor food full hollow its life long marine natural nature needle ocean poison poisonous red reef resting rock sand scuba sea seabed seafloor setosum sharp snorkeling spine spined spines spiny spotted tropical under undersea underwater urchin ven venomous water wild wildlife zoology