echinoderm
Nomes alternativos: Echinodermata
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An echinoderm is any member of the phylum Echinodermata, and can be any of the following: starfish, sea urchins, sand dollars, sea cucumbers, sea lilies. The phylum contains about 7000 living species.
Echinoderms are found globally at almost all depths and reach the highest diversity on reefs.