Close up photograph of a magnificent urchin

Echinoderms: Echinodermata, Echinoids: Echinoidea, FL, Florida, Invertebrates, Marine Life, USA, United States, close up, macro, magnificent urchin: Astropyga magnifica, marine, natural history, ocean, orange, red, underwater, underwater photo

Sea urchins belong to the phylum Echinodermata (common name Echinoderm), which also include sea stars and sea cucumbers. There are approximately 7000 described species of Echinoderms living only in marine environments.