Cycloid Fish Scale Nikon's MicroscopyU

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.

Do Fish Scales Have Calcium at Marianne Hayes blog

What is the Difference Between Placoid and Cycloid Scales

Whole Organism and Tissue Imaging, Life Sciences

Cycloid scale — Nature's Workshop Plus

What is the Difference Between Placoid and Cycloid Scales

Cycloid scales – Fishionary

Ctenoid Fish Scale Nikon's MicroscopyU

Fish micrograph hi-res stock photography and images - Alamy

Scale features and terminology of a typical smooth, thin, and