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Grateloupia doryphora

This Rhodophyte is relatively new to Narragansett Bay, appearing in the lower portions of the Bay in 1996. Grateloupia has a foliose body plan. The slippery blades can take on a variety of shapes, and the color can vary somewhat as well. The smaller reddish brown specimen seen here was collected in early summer. The bright pinkish red specimen was collected in early fall. A key feature of this alga is the filamentous medula seen here in a cross section of the thallus. This invasive species is now commonly found in many parts of the world.


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