Marsh Periwinkle (Littorina littorina) {!--총알고둥류--> Two types of marsh snails. The one on the right is Littorina littorina.
Image ID: line2241, America's Coastlines Collection
Location: Patuxent River, Maryland
Photo Date: 2000 July 30
Photographer: Mary Hollinger, NODC biologist, NOAA
Photo Source:
The NOAA Photo Library - http://www.photolib.noaa.gov
The National Oceanic & Atmospheric Adminstration (NOAA) - http://www.noaa.gov/
Copyright Information - http://www.photolib.noaa.gov/aboutimages.html