External Anatomy and Physiology of a Red Snapper Fish (Lutjanus madras)

Body elongate to moderately deep and laterally compressed. Head relatively small with pointed snout. Snout-forehead profile almost straight. Pair of small rounded nostrils on each side of snout with very low flap on outer edge of anterior nostril. Pair of canine teeth anteriorly in upper jaw, with smaller canine teeth between these and symphysis. Remaining lateral portion of upper jaw with series of embedded caniniform teeth. Lower jaw with about 6?8 small canine teeth on each side. Dorsal-fin outline slightly incised. Predorsal scales extending forward to vertical at posterior margin of pupil. Scale rows on back rising obliquely above lateral line. Lateral-line scales 49?51. Horizontal scale rows above lateral line 6?7. Scale rows on cheek 7?8. Scales absent on preopercular flange. Profile of soft dorsal-fin relatively low and weakly rounded. Pectoral fins pointed. Caudal fin emarginate. Colour. Pinkish-white base colour, becoming darker reddish-pink dorsally and down snout, and paler ventrally. Other external features were also discussed. The main objective of this present study is to create a dynamic experience to assist in understanding the external features and its Physiology of a red snapper fish (Lutjanus madras).