Fins are the specialized appendages of a fish that help them maintain balance, swim, steer, and stop. Salmon have various fins, including the dorsal fin on their back, the pelvic fins on their underside, the pectoral fins on their sides, the anal fin near their tail, and the adipose fin between the dorsal fin and the tail fin.
Scales are the small, thin, overlapping plates that cover the body of a fish, providing protection and reducing drag in water. Salmon have cycloid scales, which are smooth-edged and rounded. These scales help reduce friction as they swim through water, contributing to their efficient movement.