Scallops are marine bivalve molluscs belonging to the family Pectinidae. They are found in oceans worldwide but never in fresh water. Uniquely, many scallop species can swim by rapidly clapping their shells together, and they have a developed nervous system with simple eyes around their mantles.
Scallops are well-known as a food source, particularly their adductor muscle, and are farmed in aquaculture. Their distinctive, colorful, fan-shaped shells are popular among collectors and have been historically used in art and design.
Most scallops inhabit shallow waters up to 100 meters deep, though some prefer deeper environments. They can be found on various substrates, including sand, mud, and coral. Many begin life as attached juveniles, but most transition to free-living adults.
