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Dying purple sea urchin usually found alive and crawling around our tidepools. This week many urchins and urchin tests (skeletons) were found on the shore

Dying purple sea urchin usually found alive and crawling around our tidepools. This week many urchins and urchin tests (skeletons) were found on the shore

Clypeasteroida  ou oursin de mer vivant...c,est un animal qui fait partie de la famille des oursins : étonnant ça vaut le détour sur Wikipédia...

Clypeasteroida ou oursin de mer vivant...c,est un animal qui fait partie de la famille des oursins : étonnant ça vaut le détour sur Wikipédia...

Organisms defend themselves against environmental stress - study finds

Organisms defend themselves against environmental stress - study finds

common sea urchin - alive

common sea urchin - alive

Sea Urchin, very much alive, thus available as a "photo-op" only. Usually when I've found one of these empty, it's also either broken or missing many of its beautiful spines.

Sea Urchin, very much alive, thus available as a "photo-op" only. Usually when I've found one of these empty, it's also either broken or missing many of its beautiful spines.

Here, red sea urchins carpet a kelp forest off British Columbia. The marine invertebrates are important links in the marine food chain. Fish pick at the urchins, which feed on bits of algae.

Here, red sea urchins carpet a kelp forest off British Columbia. The marine invertebrates are important links in the marine food chain. Fish pick at the urchins, which feed on bits of algae.

Echinodermata echinoidea; spine like, ossicles are joined to form rigid test; podia pores pass through ambulacral plates; aristotle's lantern can be partially protruded from the mouth for grazing and chewing; Sea Urchins

Echinodermata echinoidea; spine like, ossicles are joined to form rigid test; podia pores pass through ambulacral plates; aristotle's lantern can be partially protruded from the mouth for grazing and chewing; Sea Urchins

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