The studied are explored the morphology and ultrastructure the shape variation of both jaws and pharyngeal teeth of four red sea fishes, different in feeding habits. investigated by light microscope and scanning electron microscopy to determine the surface teeth structure. Five adult live specimens of each type of fish are collected from the red sea at Hurghada. They are Sphyraena qenie Klunzinger, 1870, feed primarily on the fish (piscivorous); Scarus frenatus Lacepede,1802 feed primarily on algae; Cephalopholis oligosticta Randall and Ben-Tuvia,1982, feeding mainly on fish and crustaceans. Lethrinus mahsena, Forsskal,1775, the bulk of its food primarily consists of crabs, sea urchins, echinoderms and crustaceans. The study cleared that the teeth of the four species are different in their shape morphologically and ultrastructurally. The differences may be considered as adaptive modifications primarily related to the food preferences.
Key words: Morphological Specializations, Teeth, Red Sea Fish, Feeding Habit
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