Echinoderm - Wikipedia
An echinoderm (/ ɪ ˈ k aɪ n ə ˌ d ɜːr m, ˈ ɛ k ə-/) [2] is any animal of the phylum Echinodermata (/ ɪ ˌ k aɪ n oʊ ˈ d ɜːr m ə t ə /), which includes starfish, brittle stars, sea urchins, sand dollars and …
Echinoderm | Definition, Characteristics, Species, & Facts ...
2024年12月28日 · 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 …
Echinoderm - Definition, Characteristics & Examples | Biology ...
2019年10月4日 · An echinoderm is a member of the phylum Echinodermata which contains a number of marine organisms recognized by their pentamerous radial symmetry, calcareous …
Sea Stars, Urchins, and Relatives - Smithsonian Ocean
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). Some are stealthy …
Echinoderms - Definition, Characteristics, Types and Examples
2023年3月2日 · Echinoderms are a diverse group of invertebrate marine animals that include starfish, sea urchins, sand dollars, sea cucumbers, and crinoids. The phylum contains about …
Echinoderms - Definition, Examples, Characteristics, and Habitat
2024年5月6日 · Echinoderms are spiny-skinned invertebrates of the phylum Echinodermata, specifically recognized by the pentamerous body (five-pointed) symmetry in adults. The …
Phylum Echinodermata – Definition, Classification ...
2024年10月2日 · Phylum Echinodermata encompasses marine organisms characterized by a calcareous endoskeleton, pentamerous radial symmetry in adulthood, and a specialized water …