Perch have "rough" or ctenoid scales. When looking through a microscope, the scale look like a plate with growth rings and spikes on the top edges.

Do yellow perch have scales?

Yellow perch have many fine and sharp teeth. They are rough to the touch because of their ctenoid scales.

Do white perch have scales?

White perch are silvery, freshwater, or brackish water fish. ... This fish found in the Chesapeake Bay has a slightly forked tail and two dorsal fins. Its body is covered in rough, large scales and the dorsal fin closer to the front seems to have spines on it and is much harder than the posterior fin.