Sea scallops and diver scallops are the same thing, the difference is in how they are harvested. Sea scallops are harvested with nets pulled by boats. Diver scallops are harvested by hand and are typically considered more environmentally friendly. They also come with a higher price tag. Size is the main difference between sea scallops and bay scallops. Bay scallops are small and bite-sized. You will need more bay scallops per person and they tend to cook quickly so be careful not to overcook them. Larger scallops work best in this recipe.