- published: 20 Nov 2011
- views: 11000
Echinoderm is the common name given to any member of the Phylum Echinodermata (from Ancient Greek, ἐχῖνος, echinos – "hedgehog" and δέρμα, derma – "skin") of marine animals. The adults are recognizable by their (usually five-point) radial symmetry, and include such well-known animals as starfish, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or "stone lilies". Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7000 living species, making it the second-largest grouping of deuterostomes (a superphylum), after the chordates (which include the vertebrates, such as birds, fishes, mammals, and reptiles). Echinoderms are also the largest phylum that has no freshwater or terrestrial (land-based) representatives.
Aside from the hard-to-classify Arkarua (a Precambrian animal with echinoderm-like pentamerous radial symmetry), the first definitive members of the phylum appeared near the start of the Cambrian.
The Hunt for the Elusive Echinoderms
Biology: Echinoderms
Invertebrate Diversity pt. 4- Echinoderms & Intro Chordates
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Shape of Life: Echinoderms - The Ultimate Animal
Exploring Echinoderms
Equinodermos - echinoderms
Mollusks and Echinoderms
Shape of Life - A Success Story Echinoderms (Gail Kaaialii, Marine Biologist)
classes of echinoderms
Allysha Dela Cruz & Kayla Fasoldt A biology 10H project about echinoderms (eh-ky-no-derms). I have nothing witty to write in the description. Sorry not sorry. Credits (thanks to all the wonderful strangers that took videos of echinoderms in live action because we were too lazy & poor to do it ourselves): (Videos) V1: True Facts About the Sea Pig: https://www.youtube.com/watch?v=_y4DbZivHCY V2: Sea stars in time lapse: https://www.youtube.com/watch?v=CYN0J3HCihI V3: Starfish Spawning: https://www.youtube.com/watch?v=82G4Pj6X7Kc V4: The Sand Dollar: http://www.youtube.com/watch?v=O3uKWy5Vljs V5: Aquarium of the Pacific, Long Beach CA (Starfish): https://vimeo.com/360148 V6: Sand Dollar: https://vimeo.com/52472994 V7: Sea Urchins - Planktonic Origins: http://vimeo.com/15434138 V8: Sea Cucu...
Class notes on inverterbrate Diversity focusing on Echinoderms and Introducing the Phylum Chordata
http://6e319ncxs010h828uhxkuku9ry.hop.clickbank.net/ Get aquarium guide.
Echinoderms show us that animals radically different from us, even ones without a brain, can be ultimately successful.
On a recent dive into a local tank I managed to film some invertebrates; more specifically some echinoderms.
Characteristics of mollusks and echinoderms
I created this video with the YouTube Video Editor (http://www.youtube.com/editor)