Farmed scallops don't require external feed and therefore have limited impact on water quality, which contributes to their "Best Choice" recommendation.
Bay Scallop, Sea Scallop, Peruvian Scallop, Japanese/ Yesso Scallop
China is the world's largest farmed scallop producer, followed by Canada, Brazil, Ecuador and Norway. Scallops are available year-round on the US market in a variety of forms, including live, shucked, fresh, chilled, frozen, prepared or preserved. Scallops are marketed under a variety of names depending on the species, and are known as hotate or hotategai when prepared as sushi.
Scallops are farmed around the world in coastal, subtidal environments. Like all bivalves, scallops are filter-feeders and rely on natural plankton populations for food. No external feeds or nutrient fertilizers are utilized in scallop culture. Since the majority of farmed scallops are grown in their native ranges, the risks from non-native escapes are minimal. Additionally, since scallops are sourced from either natural settlement or wild-caught broodstock, there are no risks of impacts on wild populations.
Diseases are rare in scallop culture and are prevented through best management practices. No chemicals or antibiotics are used in scallop farming. Overall, the environmental impacts of scallop farming are shown to be minor and therefore receive a "Best Choice" recommendation.