<p><strong>Fig. 4.42.</strong> Four types of fish scales A) Placoid, B) Ganoid, C) Cycloid, and D) Ctenoid</p>

Fig. 4.42. Four types of fish scales A) Placoid, B) Ganoid, C) Cycloid, and D) Ctenoid

Image from Living Ocean, CRDG, University of Hawaii at Manoa