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Astrangia poculata, seen here with polyps extended.

Astrangia poculata, seen here with polyps extended.
Astrangia poculata, seen here with polyps extended.
Astrangia poculata, seen here with polyps extended.
Astrangia poculata, seen here with polyps extended.
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348843
Rioux, Terrence M.
Astrangia poculata, seen here with polyps extended.
Still Image
04/18/2006
rioux-Astrangia_colonies_insitu_33519.jpg
Image of the Day caption:
The Northern Star Coral, or Astrangia poculata, seen here with polyps extended, is a unique cold water coral that occurs in Woods Hole, MA, with (brown) and without (white) symbiotic algae. Both warm and cold-water corals are used at WHOI to research past ocean climate, past ocean circulation changes, and past sea levels. Astrangia poculata colonies are also used in culture experiments to provide insights into coral biomineralization processes and the effects of ocean acidification on calcification.
Photo by Terry Rioux
© Woods Hole Oceanographic Institution
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