The Atlantic Sea Scallop (Placopecten magellanicus) is one of the most important commercially harvested species in the United States, with annual landings over $400 million USD. Within the US fleet, most vessels are based out of New Bedford, MA where vessels primarily fish on Georges Bank and neighboring areas, requiring the combustion of fossil fuels which increases atmospheric greenhouse gas emissions. Yet, unlike other extractive fisheries, the U.S. scallop fleet shucks all scallops at sea, which returns the shells to the seafloor. In turn, these shells are composed of calcium carbonate, which can increase oceanic total alkalinity and subsequently sequester atmospheric CO2, as they dissolve. At present, no studies have examined the fuel efficiency or amount of atmospheric CO2 theoretically sequestered by shells discarded by the scallop fleet. Thus, this presentation will present analyses of the fleets greenhouse gas emissions and incorporate our initial estimates of the quantity of discarded shell material and its contribution to increasing oceanic total alkalinity and subsequent drawdown of atmospheric CO2.