purple sea urchin (paracentrotus lividus) on the beach of tenerife,canary islands,spain

sea-urchin urchin paracentrotus purple fauna ocean tenerife snorkeling lividus animal alive atlantic background beautiful biology black canary catch close-up closeup danger dangerous dive echinoderm echinoidea environment extreme food hunting island life macro marine natural nature reef rock saltwater sea seafood sharp spine spiny stones stony undersea underwater water wild beach islands spain