Periwinkle Gastropod.

Up an down they go, with the tides. Marsh periwinkles, or marsh snails (Littorina irrorata) are found in and around the marshes in North Carolina.

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Lori Harris Photography

Periwinkles play an important role in the decomposition of marsh grasses (detritus), which helps maintain a healthy salt marsh community. Science considers them an “indicator species.” If periwinkle populations are doing well, chances are the salt marsh is doing well. http://www.thepilot.com/news/2009/may/31/ask-the-aquarium-marsh-periwinkles-indicator/

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Lori Harris Photography

I am always mesmerized by the numbers and beauty of the ecosystem of our marsh.

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Lori Harris Photography

Here is a site with macro photography of these marsh snails by Jeffrey Pippen: http://people.duke.edu/~jspippen/mollusca/marshsnails.htm

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