hey what's echinodermata
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a phylum of marine invertebrates which includes starfishes, sea urchins, brittlestars, crinoids, and sea cucumbers. They have fivefold radial symmetry, a calcareous skeleton, and tube feet operated by fluid pressure.
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An echinoderm is any member of the phylum Echinodermata of marine animals. The adults are recognizable by their radial symmetry, and include starfish, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or "stone lilies
Scientific name: Echinodermata
Higher classification: Deuterostome
Rank: Phylum
Phylum: Echinodermata; Bruguière, 1791
Kingdom: Animalia
Subkingdom: Eumetazoa
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