GEORGE BERNARD / SCIENCE PHOTO LIBRARY GEORGE BERNARD / SCIENCE PHOTO LIBRARY
Scales of the Atlantic salmon, Salmo salar. These cycloid scales (circular, untoothed) are found in smooth-finned fishes such as salmon. The age of fish can be determined from the annual growth rings on scales. This is a useful method in salmon farming where age-composition of fish groups is analysed. Scales can be plucked without serious injury to the fish. Pigment in the scale epidermis gives the fish its markings.
Model release not required. Property release not required.