The essential amino acid profile of D. magnawas determined by examining its essential amino acid content. Essential amino acid analysis was conducted using an HPLC type 1100 with a Eurospher 100-5 C18, 250 4.6 mm column that has P/N: 1115Y535 precolumn. The effluents were (A) 0.01 M acetate buffer at pH 5.9; and (B) 0.01 M MeOH acetate buffer at pH 5.9; THF >80:15:5 L fluorescence: Ext: 340 mm Em: 450 nm. About 2.5 g of sample was put into a sealed glass (AOAC 1999). Then, 15 mL of HCl 6 N was added. The mixture was then vortexed for homogeneity and underwent hydrolysis using an autoclave at 110C for 12 hours, before being cooled down to room temperature and neutralized with NaOH 6 N. After the addition of 2.5 mL of 40% Pb acetate and 1 mL of 15% oxalate acid, around 3 mL of the mixture was filtered with 0.45 mm millex. For the injection into HPLC, 25 mL of the filtered mixture plus 475 mL of OPAA solution was vortexed and incubated for 3 minutes. Finally, 30 mL of finalmixture was put into the HPLC.