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Plate 3.— Classification: system Marine, subsystem Intertidal, class Rocky Shore and Aquatic Bed, water regime Regularly 

 Flooded and Irregularly Flooded, water chemistry Euhaline. In this photo taken at low tide, the dominant organisms are 

 rockweed (Fucus spp.) and acorn barnacles {Balanus spp.l. (Newport County, Rhode Island; July 1977) 



