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Echinaster spinulosus is a medium sized sea star with five long tapering arms, round in cross section, attached to a central disc. Near one edge of this is the madreporite, a structure used for drawing in water to replenishing the water vascular system.
Astropecten spinulosus is a sea star of the family Astropectinidae. Habitat and behaviour. Starfishes of the genus Astropecten live on mobile seabed (sandy, muddy or ...
Echinaster is a well-studied and common genus of starfish containing ~30 species and is the second-largest genus found within the family Echinasteridae. [2] The genera Henricia and Echinaster encompass 90% of all the species found within the family Echinasteridae. [3]
These sea stars are similar one to each other and it can be difficult to determine with certainty the species only from a photograph. To have a certain determination, in some cases, animals should be analyzed in the laboratory or using genetic testing, but often it isn’t possible. In order to determine the species, with a reasonable margin of ...
Astropecten platyacanthus reaches or exceeds 10 cm in diameter, while Astropecten spinulosus reaches at maximum just under 10 cm in diameter. Young specimens of Astropecten platyacanthus sometimes can be confused with Astropecten jonstoni for the appearance and the colour, but it is always easy to distinguish them by very different ...
This group includes the cushion stars, [113] the leather star [114] and the sea daisies. [115] Velatida (4 families, 16 genera, 138 species) [116] This order of starfish consists mostly of deep-sea and other cold-water starfish often with a global distribution. The shape is pentagonal or star-shaped with five to fifteen arms.
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Zoroaster is a genus of sea stars belonging to the family Zoroasteridae. ... Zoroaster spinulosus Fisher, 1906; Zoroaster tenuis Sladen, ... (sea star) at Wikispecies ...