WebE·chi·no·der·ma·ta. ( e-kī'nō-der'mă-tă ), A phylum of Metazoa that includes starfish, sea urchins, sea lilies, and other classes. All but the sea cucumbers (Holothuroidea) are basically radially symmetrical and most possess a calcareous endoskeleton with external spines. They inhabit the sea bottom, some near shore, others in deep water.
Echinoderm Definition, Characteristics, Species, & Facts
Web/ ɪˈkaɪ.noʊ.dɝːm/ How to pronounce echinoderm noun in American English (English pronunciations of echinoderm from the Cambridge Advanced Learner's Dictionary & … WebMar 18, 2024 · echinoderm ( plural echinoderms ) An animal of the phylum Echinodermata, comprising radially symmetric, spiny-skinned marine animals including … jefferson memorial inscriptions
Sea star echinoderm Britannica
WebEchinoderms are efficient scavengers of decaying matter on the seafloor, and they prey upon a variety of small organisms, thereby helping to regulate their numbers. When present in large numbers, sea urchins can devastate sea-grass beds in the tropics, adversely affecting the organisms dwelling within. WebEchinoderms are named for the spines or bumps covering the outer surface of the bodies of many of them (Greek root word echino- meaning spiny; Latin root word -derm meaning skin).Examples of echinoderms … Webcrinoid, any marine invertebrate of the class Crinoidea (phylum Echinodermata) usually possessing a somewhat cup-shaped body and five or more flexible and active arms. The arms, edged with feathery … oxonet