Bass Scale
by Dr Keith Wheeler/science Photo Library
Title
Bass Scale
Artist
Dr Keith Wheeler/science Photo Library
Medium
Photograph - Photograph
Description
Bass scale. Polarised light micrograph of a ctenoid scale from the skin of a bass (Dicentrarchus labrax). The scales are just under the fish's skin and form a protective skeleton. Each scale plate consists of a lower fibrous plate and an upper clear plate of dentine. Dentine is added to the edge of the plate each year. In the summer the plate grows faster (thick ring) than in the winter (thin ring), so each year's growth is demarcated. On this scale, there are around twenty concentric growth rings, which means the bass is approximately twenty years old. Magnification: x10 when printed at 10 centimetres across.
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October 17th, 2019
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