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| echinoderm Marine coelomate animals distinguished from all others by an internal skeleton composed of calcite plates, and a water-vascular system to serve the needs of locomotion, respiration, nutrition or perception | |||
| echinoderms (Echinodermata) | |||
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| echinoderm Marine coelomate animals distinguished from all others by an internal skeleton composed of calcite plates, and a water-vascular system to serve the needs of locomotion, respiration, nutrition or perception | |||
| echinoderms (Echinodermata) | |||