Gloucester: Kayla Saltenstall, 9, looks at plankton samples through a microscope as Joseph Kotob, 8, checks out memebers of the fouling community, which are the organisma that stick to things like docks and buoys, at the Gloucester Maritime Heritage Center table during the Earth Day/Green Energy Fair run by the PTO at the West Parish Elementary School Friday night. Also pictured is Maria Kotob, 10, left. Mary Muckenhoupt/Gloucester Daily Times

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