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The sea pen, Ptilosarcus gurneyi, is a colonial cnidaria in the same class as the anemone, the anthozoa. One polyp has been modified to form the body while the fringes of the "feather" contain numerous small feeding polyps. Typically we find it living in a mud/sand substrate. It is rare around Race Rocks, with a few individuals occuring on the North-West corner of Great Race Island. Note the small burrowing tubeworms in the mud around the organism. This specimen was videoed by Wynne Lawrence and Jean-Olivier Dalphond, both students at the Lester B. Pearson College.



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