Echinodermata

Echinodermata

(Science: marine biology) phylum of exclusively marine animals. The phylum is divided into 5 classes: the Asteroidea (starfish), the echinoidea (sea urchins), the ophiuroidea (brittle stars and basket stars), the Holothuroidea (the sea cucumbers) and the Crinoidea (sea lilies and feather stars).


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