Tilapia is a kind of freshwater fish consumption. This fish introduced from Africa, eastern Africa precisely, in 1969, and has now become a popular pet fish in freshwater ponds in Indonesia and pests in every river and lake Indonesia. The scientific name is Oreochromis niloticus. the medium-sized pet, the total length of the snout to the tip of the tail reaches about 30 cm and sometimes nothing more and nothing less than that. Dorsal fin (with 16-17 sharp spines and 11-15 soft radii thorns; and pinnae analyst anal fin with 3 spines and 8-11 fingers. Body colored black or gray, with some transverse dark bands (stripes) are increasingly blurred in adult fish. Striped tail erect, 7-12 pieces. Throat, pectoral, pelvic fins, tail fins and dorsal fin tip with red or reddish when berbiak.ada season on the line linea literalist truncus tool function is to balance the fish while swimming Tilapia are still small yet visible difference genitals. After his weight reached 50 grams, can know the difference between males and females. The difference between male and female fish can be seen in the genital hole and secondary sex characteristics. In male fish, in addition to the anus is a hole in the form of genital small bulge tapering as a spending urinary tract and sperm. Body of male fish are also darker in color, with a jaw bone extends to the rear to give a solid impression, while females usually on the big belly
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