Echinodermata Fossil range: Cambrian (or earlier?) - Recent | |
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Scientific classification
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Eukarya | |
Eumetazoa | |
Deuterostoma | |
Echinodermata | |
Subdivisions: |
† = Extinct |
Echinoderms (Phylum Echinodermata) are a phylum of marine animals. Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone. Aside from the problematic Arkarua, the first definitive members of the phylum appeared near the start of the Cambrian period.