Rockport: From left, Hayden Beaton, Austin Waalewyn, Ariana Bouchie, Michael Kobrosky and Preston Mattson, all first and second graders, look at seaweed in a science room at Rockport Elementary School Thursday morning. Mary Kay Taylor from the Gloucester Maritime Heritage Center came to talk about invasive species found in the ocean like seaweed and periwinkles. Mary Muckenhoupt/Gloucester Daily Times

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