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Ophidiaster Tuberifer
''Ophidiaster'' is a genus of echinoderms belonging to the family Ophidiasteridae. The genus has almost cosmopolitan distribution. Species: *'' Ophidiaster agassizi'' *'' Ophidiaster alexandri'' *'' Ophidiaster arenatus'' *'' Ophidiaster armatus'' *'' Ophidiaster attenuatus'' *'' Ophidiaster bayeri'' *'' Ophidiaster bicolor'' *'' Ophidiaster bullisi'' *'' Ophidiaster chinensis'' *'' Ophidiaster colossus'' *''Ophidiaster confertus'' *'' Ophidiaster cribrarius'' *'' Ophidiaster davidsoni'' *'' Ophidiaster duncani'' *''Ophidiaster granifer ''Ophidiaster granifer'', the grained seastar, is a species of starfish in the family Ophidiasteridae. It is found in the Red Sea and the Indo-Pacific and is the only known species of starfish to reproduce by parthenogenesis. Description ''Ophi ...'' *'' Ophidiaster guildingi'' *'' Ophidiaster helicostichus'' *'' Ophidiaster hemprichi'' *'' Ophidiaster kermadecensis'' *'' Ophidiaster lorioli'' *'' Ophidiaster ludwigi'' * ...
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Echinoderm
An echinoderm () is any member of the phylum Echinodermata (). The adults are recognisable by their (usually five-point) radial symmetry, and include starfish, brittle stars, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or "stone lilies". Adult echinoderms are found on the sea bed at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates. Echinoderms are the largest entirely marine phylum. The first definitive echinoderms appeared near the start of the Cambrian. The echinoderms are important both ecologically and geologically. Ecologically, there are few other groupings so abundant in the biotic desert of the deep sea, as well as shallower oceans. Most echinoderms are able to reproduce asexually and regenerate tissue, organs, and limbs; in some cases, they can undergo complete regeneration from a single limb. ...
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Ophidiaster Granifer
''Ophidiaster granifer'', the grained seastar, is a species of starfish in the family Ophidiasteridae. It is found in the Red Sea and the Indo-Pacific and is the only known species of starfish to reproduce by parthenogenesis. Description ''Ophidiaster granifer'' is a small five armed starfish with a cryptic mottled brown colouration. It has a rough, granular appearance and grows to a diameter of about . The disc is quite small and the medium-length, fairly broad arms have rounded tips. Biology No male ''Ophidiaster granifer'' has ever been identified and all known adults are female. As far as is known, ''Ophidiaster granifer'' is the only member of the phylum Echinodermata to reproduce exclusively by parthenogenesis. In this species, eggs are liberated into the sea in a synchronous spawning event but no fertilisation takes place. The eggs are large, with a diameter of and the mother attaches some of them to the underside of boulders. Here they develop until they undergo metam ...
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Ophidiaster Rhabdotus
''Ophidiaster'' is a genus of echinoderms belonging to the family Ophidiasteridae. The genus has almost cosmopolitan distribution. Species: *'' Ophidiaster agassizi'' *'' Ophidiaster alexandri'' *'' Ophidiaster arenatus'' *'' Ophidiaster armatus'' *'' Ophidiaster attenuatus'' *'' Ophidiaster bayeri'' *'' Ophidiaster bicolor'' *'' Ophidiaster bullisi'' *'' Ophidiaster chinensis'' *'' Ophidiaster colossus'' *''Ophidiaster confertus'' *'' Ophidiaster cribrarius'' *''Ophidiaster davidsoni'' *'' Ophidiaster duncani'' *''Ophidiaster granifer'' *'' Ophidiaster guildingi'' *'' Ophidiaster helicostichus'' *'' Ophidiaster hemprichi'' *'' Ophidiaster kermadecensis'' *'' Ophidiaster lorioli'' *'' Ophidiaster ludwigi'' *'' Ophidiaster macknighti'' *'' Ophidiaster multispinus'' *'' Ophidiaster ophidianus'' *'' Ophidiaster perplexus'' *'' Ophidiaster perrieri'' *'' Ophidiaster reyssi'' *'' Ophidiaster rhabdotus'' *''Ophidiaster tuberifer ''Ophidiaster'' is a genus ...
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Ophidiaster Ophidianus
''Ophidiaster ophidianus'', the purple starfish, is a species of starfish from the East Atlantic (from mainland Portugal and the Azores down to the Gulf of Guinea) and the Mediterranean Sea The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the .... It has a big variation in colour (from red to orange) and may present brown spots.Marques, V. M. (1983), ''Arquivos do museu Bocage (Série A)''. Vol. II, nº 1, pgs 1-12 Micael, J., Alves, M. J., Costa, A. C. (2012). Diversity of shallow-water asteroids (Echinodermata) in the Azorean Archipelago, ''Marine Biodiversity Records'', Vol. 5, e49, pgs 1-10. DOI: 10.1017/S1755267211000534 The central disc is small, covered by irregular plates, and the arms are thinner near the central disc. Each arm has lines of respiratory papillae. It can reach 40 c ...
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Ophidiaster Multispinus
''Ophidiaster'' is a genus of echinoderms belonging to the family Ophidiasteridae. The genus has almost cosmopolitan distribution. Species: *'' Ophidiaster agassizi'' *'' Ophidiaster alexandri'' *'' Ophidiaster arenatus'' *'' Ophidiaster armatus'' *'' Ophidiaster attenuatus'' *'' Ophidiaster bayeri'' *'' Ophidiaster bicolor'' *'' Ophidiaster bullisi'' *'' Ophidiaster chinensis'' *'' Ophidiaster colossus'' *''Ophidiaster confertus'' *'' Ophidiaster cribrarius'' *''Ophidiaster davidsoni'' *'' Ophidiaster duncani'' *''Ophidiaster granifer'' *'' Ophidiaster guildingi'' *'' Ophidiaster helicostichus'' *'' Ophidiaster hemprichi'' *'' Ophidiaster kermadecensis'' *'' Ophidiaster lorioli'' *'' Ophidiaster ludwigi'' *'' Ophidiaster macknighti'' *'' Ophidiaster multispinus'' *'' Ophidiaster ophidianus'' *''Ophidiaster perplexus'' *''Ophidiaster perrieri'' *''Ophidiaster reyssi'' *''Ophidiaster rhabdotus'' *''Ophidiaster tuberifer ''Ophidiaster'' is a genus of ...
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