Coastal ponds of southeastern Massachusetts support seven species of freshwater mussels, including three state-listed species: tidewater mucket (Leptodea ochracea), eastern pondmussel (Ligumia nasuta), and triangle floater (Alasmidonta undulata). These glacially derived kettlehole ponds are revered for their clear water and sandy beaches, however, their proximity to intensifying urban development is putting enormous strain on these ecosystems in the form of shoreline development, recreational use, eutrophication, and introductions of invasive plants and animals. From 2007-2009, the Massachusetts Natural Heritage and Endangered Species Program has hired Biodrawversity LLC to conduct research to understand the status and habitat of freshwater mussels and to develop long-term conservation strategies. Our mussel biologists have conducted SCUBA surveys in more than 15 ponds, using semi-quantitative and quantitative study designs to determine diversity patterns, abundance, demographics, habitat, and the effects of docks, motorboat use, and trampling. Our results are being used to guide environmental permitting and conservation planning.