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USGS scientists study polluted groundwater discharging onto a shallow coral reef in Hawai'i, join a research cruise to understand the seafloor topography of the Rio Grande Rise, welcome a Fulbright Scholar to the PCMSC Coral Reef Project, publish an article on a 20 year study of regional acidification trends in Florida shellfish estuaries, and more in this March 2018 issue of Sound Waves.