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This species is often found within holes they grind in rock (probably over multiple generations) with their teeth and spines. They may even erode holes in steel pilings by flaking off rust. The photos above and below were taken at Little Corona del Mar, CA by Dave Cowles, March 2005
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The species often covers itself with rocks and algae, which it holds onto with its tube feet, as seen in this tidepool at Dana Point, CA Photo by Dave Cowles, March 2005
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These individuals in a Cape Flattery tidepool have covered themselves with fragments of shells and dead barnacles. Photo by Dave Cowles, July 2010
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Strongylocentrotus purpuratus, Little Corona del Mar, CA (Photo by: Dave Cowles, March 2005)
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Foto Fitis, www.fotofitis.nl
Ecomare
Green sea urchins; Levende zeeboontjes.
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Sea potato; Zeeklit.
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Green sea urchin; Zee-egel.
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Eccentric Sand Dollar (Dendraster excentricus), Ganges Harbour, Salt Spring Island, British ColumbiaSource: http://en.wikipedia.org/wiki/File:Eccentric_sand_dollar.jpg
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Encope cocosi, holotype, aboral spinesEncope cocosi, holotype NHMLA 39.1, Bahia Wafer, Isla de Cocos, Costa Rica
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Encope cocosi, holotype, posterior lunuleEncope cocosi, holotype NHMLA 39.1, Bahia Wafer, Isla de Cocos, Costa Rica
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Encope cocosi, holotype, lateral view (anterior to right)Encope cocosi, holotype NHMLA 39.1, Bahia Wafer, Isla de Cocos, Costa Rica
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Encope cocosi, holotype, oral view Encope cocosi, holotype NHMLA 39.1, Bahia Wafer, Isla de Cocos, Costa Rica
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Encope cocosi, holotype, aboral view Encope cocosi, holotype NHMLA 39.1, Bahia Wafer, Isla de Cocos, Costa Rica
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Encope californica, lateral view of denuded test (anterior to right)Encope californica, Mogote, La Paz, Mexico, Gulf of California.
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Encope californica, oral view of denuded testEncope californica, Mogote, La Paz, Mexico, Gulf of California.
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Encope californica, aboral view of denuded testEncope californica, Mogote, La Paz, Mexico, Gulf of California.
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Encope fragilis, holotype, posterior lunuleEncope fragilis, holotype NHMLA 43.4, North of White Friars, Guerrero, Mexico
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Encope fragilis, holotype, aboral spinesEncope fragilis, holotype NHMLA 43.4, North of White Friars, Guerrero, Mexico
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Encope fragilis, holotype, lateral view (anterior to right)Encope fragilis, holotype NHMLA 43.4, North of White Friars, Guerrero, Mexico
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Encope fragilis, holotype, oral viewEncope fragilis, holotype NHMLA 43.4, North of White Friars, Guerrero, Mexico
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Encope fragilis, holotype, aboral viewEncope fragilis, holotype NHMLA 43.4, North of White Friars, Guerrero, Mexico
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Encope insularis, holotype, lateral view (anterior to right)Encope insularis, holotype NHMLA LACM1934-2.21, Bahia Braithwaite, Isla Socorro, Islas Revillagigedo, Mexico
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Encope insularis, holotype, oral viewEncope insularis, holotype NHMLA LACM1934-2.21, Bahia Braithwaite, Isla Socorro, Islas Revillagigedo, Mexico
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Encope insularis, holotype, aboral viewEncope insularis, holotype NHMLA LACM1934-2.21, Bahia Braithwaite, Isla Socorro, Islas Revillagigedo, Mexico