WEB4 days ago · According to the Mayo Clinic: “Fatty fishes, such as salmon, trout, mackerel, herring, sardines, pilchards and kippers, are rich in heart-healthy omega-3 fatty acids. These have been shown to improve memory when eaten one to two times per week. Shellfish and crustaceans, such as oysters, mussels, clams, crayfish, shrimp and …