Bay scallops are farmed primarily using lantern-shaped nets suspended from long lines underwater either on the seafloor or in a water column. Most bay scallops come from Chinese farmers, although there are some farmers in New England. Bay scallops filter the water so farmers don’t use treatment on them and farming of this species doesn’t create waste.
The majority of farmed scallops are raised “off-bottom,” a method where they are harvested by hand, according to the Monterey Bay Aquarium. Some scallops are raised “on-bottom” in culture plots, meaning they are removed using a heavy net dredge that can harm ecosystems and negatively impact marine life, causing diversity to decline, according to the Monterey Bay Aquarium.