close-up macro photograph taken underwater of diadema sp. generally known as sea urchin, with its long spines.

antillarum aquarium biology black closeup corals creature dangerous dead deep defence defense diadema diadematidae diadematoida diving echinodermata echinoidea life lime long macro marine natural nature ocean painful park poisonous savignyi scuba sea self setosum sharp snorkeling species spikes spine spined spines stimulus sting stings sunlight toxic under urchin venomous water zoology