Are scallops rare?

Could you elaborate on the rarity of scallops, specifically in terms of their availability and their status in the culinary and seafood industries? Are there certain types of scallops that are considered more scarce than others, and if so, what factors contribute to their rarity? Are scallops in high demand, or do they have a stable supply and demand ratio? Additionally, how do their rarity, if any, affect their price and availability to consumers?