Salmon Scales
by Science Photo Library
Title
Salmon Scales
Artist
Science Photo Library
Medium
Photograph - Photograph
Description
Salmon scales. Coloured scanning electron micrograph (SEM) of salmon (Salmo salar) scales. Fish scales are are classified by shape. Salmon scales are known as cycloid (curve edged). As the fish grows, the scale increase in size and growth rings called circuli become visible. During cooler months of the year the scale grows more slowly and the circuli are closer together leaving a band called an annulus. By counting the annuli it is possible to estimate the age of the fish. Magnification: x13 when printed 10 centimetres wide.
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October 7th, 2018
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