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"Arrangement of scales in the Roach (Leuciscus rutilus). L, Lateral line; t r, transverse line; a, transverse line from lateral line to yentral fin." — Encyclopedia Britannica, 1893

Roach Scale Arrangement

"Arrangement of scales in the Roach (Leuciscus rutilus). L, Lateral line; t r, transverse line; a, transverse…