Echinodermata - Zooplankton

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are absent 4 STRONGYLOCENTROTUS Phylum Echinodermata Subphylum Eleutherozoa Class Echinoidea Subclass Regularia Order 28 Biology of Echinodermata  echinodermata Characteristics of Echinodermata · They have a star-like appearance and are spherical or elongated · They are exclusively marine animals · The organisms are