The principal purpose of scales is to give fish external protection, but not all fish species have them. However, those that do may be covered in scales of various shapes, sizes, and types. The primary categories of fish scales are placoid, cosmoid, ganoid, cycloid and ctenoid scales.
Mic-UK: Fishes and scales
Fish Biology and Fish Scales - Look at fish scales under the
Mic-UK: Fishes and scales
Cycloid fish scales hi-res stock photography and images - Alamy
Fish Biology and Fish Scales - Look at fish scales under the
What is the Difference Between Placoid and Cycloid Scales
Scale characteristics shown for a cycloid scale of Seriola
Differential Interference Contrast (DIC)
Fish Scale Types, w.m. Microscope Slide
Differential Interference Contrast (DIC)
102 Cycloid Scale Royalty-Free Photos and Stock Images
Cycloid scale
Cycloid scale