The amino acid composition of adult S. dichotomus was determined; the levels of essential amino acids in proteins were 7.7% lysine, 2.8% methionine, 1.6% histidine, 7.4% arginine, 4.6% isoleucine, 8.2% leucine, 4.9% valine, 4.3% glycine, and 5% threonine which are higher than those of the Artemia