In practice this excludes all but cycloid and ctenoid scales. It is covered with moderately large ctenoid scales. Their scales are generally harsh and rough to the feel, or ctenoid. Leptoid scales come in two forms&colon; cycloid and ctenoid. The head and fins are covered with ctenoid scales. They have small- to medium-sized ctenoid scales. The scales finely ctenoid, the scaly cheeks contrasting with the scaleless interorbital region. The body is partially clothed in small ctenoid scales. Most have smooth and overlapping ganoid, cycloid or ctenoid scales. Their scales may be cycloid or ctenoid. White crappies have spinous rays and ctenoid fish scales found in advanced teleosts. Most ray-finned fishes have ctenoid scales. They are rough to the touch because of their ctenoid scales. True perch have "rough" or ctenoid scales. Most of the head and body is covered in large, ctenoid scales.