What type of scales impart a definite roughness when handling a fresh catch of Yellow Perch?
Answer
Ctenoid scales
The tactile sensation derived from running a hand along the side of a freshly caught Yellow Perch is one of definite roughness. This texture is imparted by the structure of the fish's scales, which are identified as ctenoid scales. Ctenoid scales are characterized by small, tooth-like projections (ctenii) along their exposed posterior margin, which creates friction against touch. This scale type is common among many advanced bony fish, differentiating them from fish possessing smoother cycloid scales.
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