USA MA: Plum Island Sound USA MA: Plum Island Sound Illustration map of Plum Island Sound in Massachusetts, USA map, ecosystem, geography, geographical, USA, United States of America, MA, Massachusetts, Plum Island, Sound, Parker, Rowley, Eagle Hill, Merrimack, Ipswich River, Atlantic Ocean 2010-02-16 image/svg+xml USA MA: Plum Island Sound 2010-02-16 Integration and Application Network https://ian.umces.edu/media-library/usa-ma-plum-island-sound/ https://ian.umces.edu/media-library/usa-ma-plum-island-sound/ en-US map, ecosystem, geography, geographical, USA, United States of America, MA, Massachusetts, Plum Island, Sound, Parker, Rowley, Eagle Hill, Merrimack, Ipswich River, Atlantic Ocean Illustration map of Plum Island Sound in Massachusetts, USA