Padilla Bay National Estuarine Research Reserve. The Mud Snail, Batillaria attramentaria, is abundant on soft mud or high intertidal zones of quiet bays and estuaries from Boundary Bay, British Columbia, to Elkhorn Slough, California . The shell is long, slender, and about 35mm long. It was introduced from Japan to the U.S. and is common where Japanese oysters were planted.

Image ID: nerr0806, NOAA National Estuarine Research Reserve Collection
Location: North Puget Sound, Anacortes, Washington

Photo Source:
The NOAA Photo Library - http://www.photolib.noaa.gov
The National Oceanic & Atmospheric Adminstration (NOAA) - http://www.noaa.gov/
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