Ganoine is a characteristic component of ganoid scales. It is a characteristic component of ganoid scales. The skin was covered with thick, rhomboid, ganoid (enamel-like) scales. Edges of the ganoid scales and in between are black. It typically grows to about and is armored by rows of interlocking, rhomboidal ganoid scales. Most have smooth and overlapping ganoid, cycloid or ctenoid scales. Its body is elongated and subcylindrical, and covered in ganoid scales. The body is covered in thick, bonelike, and rhombic (ganoid) scales. Gars have diamond-shaped, thick, enamel (ganoid) scales. The Florida gar has no ganoid scales on its throat. Ganoid scales are nearly impenetrable and are excellent protection against predation. Unlike ganoid scales, further scales are added in concentric layers as the fish grows. Most ganoid scales are rhomboidal (diamond-shaped) and connected by peg-and-socket joints. Ganoid scales are found in the sturgeons, paddlefishes, gars, bowfin, and bichirs. In this way, ganoid scales are nearly impenetrable and are excellent protection against predation.