Abstract: The muscle and sexual gonad were separated from wild and cultural Scylla paramammosain （six of each kind, half male and female） for nutrient analysis. The results showed that the differences in moisture, crude protein, crude fat and crude ash between the muscle and gonad of wild and cultured Scylla paramammosain were significant （P<0.05）. There were differences between the 17 amino acids detected in muscles and gonads of wild cand cultured crabs. The total amount of flavor amino acids （FAA） in the muscles of wild crabs was significantly lower than that of cultured （P<0.05）, and the proportion of essential amino acids （EAA） was significantly higher than that of cultured （P<0.05）. There were also differences in the composition of fatty acids in the muscle and gonad of wild and cultured crabs. The fatty acid composition of the two crabs has their own advantages.

Key words: Scylla paramammosain, muscle, gonad, nutritional composition