Figure 4: The lateral line system of red tail shark. A: Tuberous organ (square, inserted figure) stained by HE that composed of sensory cells (1), supporting cells (2). B: Tuberous organs (arrow heads) stained by PAS-AB-HX are covered by flattened cells (arrows) and innervated by nerve fibers (asterisk). C and D: Canal neutomast (arrowheads) stained by HE surrounded by fibrous tissue (asterik). E: superficial neuromast (arrowhead) stained by HE formed of sensory cells (1), supporting cells (2), basal cells (3) and mantle cells (4). F: Superficial neuromast stained with Crossmon's trichrome showing attached cupula (arrowhead).