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This subtidal seastar frequently has its papulae out, which makes the rays appear smooth and gelatinous as seen here. The aboral ossicles form spines which are single, clustered, or in a network. Photo by Dave Cowles, July 2005
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There are no large marginal plates on the rays. A row of small spines can close over the ambulacral grooves. Photo by Dave Cowles, July 2005
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Pisaster brevispinus, found off Northwest Island, Rosario Bay. Ruler is 12 inches (30 cm). (Photo by: Dave Cowles, July 2005)
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Another individual, with three symbiotic Arctonoe sp scaleworms attached. Ruler is 1 foot (30 cm). Photo by Dave Cowles, July 2005
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The aboral surface has large spines (1-2 mm long) arranged singly. Smaller spines and pedicellariae are arranged in circles around the large spines. Photo by Dave Cowles, July 2005
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There are no large marginal plates on the rays. The stomach can be everted, as it was shortly before this photo. Photo by Dave Cowles, July 2005
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This view of the aboral side of the central disk shows the networklike system of spiny ossicles. Photo by Dave Cowles, July 2008
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This individual, with individual rays from 25-30 cm long, was collected by otter trawl from 75 m depth in San Juan Channel. Notice that it has lost one ray which it is beginning to regenerate. Photo by Dave Cowles, July 2008
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This individual, photographed under the Keystone ferry drawbridge, is purple in color. Photo by Dave Cowles, July 2011
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Evasterias troschelii subtidal from Sares Head, WA. Ruler is 6 inches (Photo by: Dave Cowles, July 2001)
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Leptasterias aequalis (Stimpson, 1862) Common Names: Colorful six-rayed star, six-rayed Star, broad six-rayed star, delicate six-armed star Leptasterias aequalis from lower intertidal of Sares Head, 6-2011. Total arm spread 4 cm. Photo by: Dave Cowles, June 2011
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