Echinoderm - Wikipedia There are about 7,600 extant species of echinoderm as well as about 13,000 known extinct species [9][10] All echinoderms are marine, but they are found in habitats ranging from shallow intertidal areas to abyssal depths
Echinoderm | Definition, Characteristics, Species, Facts | Britannica Echinoderm, any of a variety of invertebrate marine animals belonging to the phylum Echinodermata, characterized by a hard, spiny covering or skin Living species include sea lilies, sea urchins, sea cucumbers, starfishes, basket stars, and sea daisies
Echinoderms - Definition, Examples, Characteristics, and Habitat Echinoderms are spiny-skinned invertebrates of the phylum Echinodermata, specifically recognized by the pentamerous body (five-pointed) symmetry in adults The phylum derives its name from the Greek words ‘ekhînos,’ meaning ‘ hedgehog,’ and ‘dérma,’ meaning skin
Sea Stars, Urchins, and Relatives - Smithsonian Ocean Together, these animals make up the Echinodermata, a word with Greek origins meaning “hedgehog skin ” Echinoderms live in every ocean, even off the coast of Antarctica Well known as coastal dwellers, they can be found at depths over three miles deep (5,000 meters)
Echinoderms ~ MarineBio Conservation Society Echinoderms are a diverse group of marine animals belonging to the phylum Echinodermata They are characterized by a unique radial symmetry and a spiny or prickly outer skin The name “echinoderm” translates to “spiny skin,” which describes their appearance
Echinoderms - Definition, Characteristics, Types and Examples Echinoderms are a diverse group of invertebrate marine animals that include starfish, sea urchins, sand dollars, sea cucumbers, and crinoids The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates
About Echinoderms | Assembling the Echinoderm Tree of Life Whereas five major groups of echinoderms are living today (starfish, brittle stars, sea urchins, sea cucumbers, and sea lilies), more than 20 other, equally distinctive extinct echinoderms groups lived during the past
All About Echinoderms - Ocean Conservancy For a family of slow-moving creatures with no brains or bones, you’d expect echinoderms to really struggle for survival But while there are several threats facing echinoderms, some species have been around for more than 500 million years If you’ve never heard of echinoderms before, we’ve got you covered
Phylum Echinodermata - Definition, Classification, Characteristics . . . Distributed extensively across marine habitats, Echinoderms inhabit the vast expanse from intertidal zones to the profound depths of abyssal zones With a repertoire of approximately 7,000 species, this phylum stands as the second most extensive, surpassed only by Phylum Chordata
Echinoderm - Definition, Characteristics Examples - Biology Dictionary An echinoderm is a member of the phylum Echinodermata which contains a number of marine organisms recognized by their pentamerous radial symmetry, calcareous endoskeleton, and a water vascular system which helps operate their small podia