Fig. 4
From: Surface morphology of the oral cavity of redbelly tilapia, Coptodon zillii (Gervais, 1848)
SEM photograph shows the lower jaw and the lower lip. Views (a and b) show the middle part of the lower jaw. Views (c and e) show the lower lip. Views (d and h) show the corner of the lower jaw. Views (f and i) show taste buds (TB) between the teeth of the lower jaws. View (j) shows the pore of the mucous gland (P) and the epithelium appeared like fish scales (blue arrowheads). View (g) shows the magnification of taste bud (TB) on highly elevated epithelial protrusion (red arrowhead). LCT- lower caudal teeth, LRT- lower rostral teeth, LV- lower valve, P- pore of mucous gland, T- tongue. The yellow arrowheads refer to slightly elevated epithelial protrusions. The epithelium appeared like fish scales (blue arrowheads). The white asterisks refer to the median area that is devoid of the lower rostral teeth. The blue asterisks refer to a median elevated area between the lower caudal teeth