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Echinoderms (starfish, brittle star, sea urchin, feather star, sea cucumber) - marine biology (characteristics, ecology and range, behavior), underwater photography.
Echinoderm, any of a variety of invertebrate marine animals belonging to the phylum Echinodermata, characterized by a hard, spiny covering or skin. Beginning with the dawn of the Cambrian Period (542 million to 488 million years ago), echinoderms have a rich fossil history and are well represented.
Echinoderms, or members of the phylum Echinodermata, are some of the most easily-recognized marine invertebrates.This phylum includes sea stars (starfish), sand dollars, and urchins, and they are identified by their radial body structure, often featuring five arms. You can often see echinoderm species in a tidal pool or in the touch tank at your local aquarium.
Echinoderms 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 include sea stars, sea urchins, sea cucumbers, brittle stars, and feather stars (Fig. 3.83). Although they may appear very different, echinoderms all have two major defining characteristics.
Classification of an Echinoderm Dill, Henry Kennedy High School 1-312-838-5225 Objective To understand how the starfish relates to its classification.Materials Preserved Echinoderms, spiders, and other invertebrates and vertebrates. Microscope projector.
CLASSIFICATION OF ECHINODERMATA. Phylum ECHINODERMATA. Echinoderms are triploblastic, coelomate animals with radial symmetry and spiny skin. They possess a water vascular system with tube feet which are used for locomotion and food capturing.
Echinoderm definition, any marine animal of the invertebrate phylum Echinodermata, having a radiating arrangement of parts and a body wall stiffened by calcareous pieces that may protrude as spines and including the starfishes, sea urchins, sea cucumbers, etc. See more.