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For instance, semi intensive aquaculture farming for prawns is the most widely spread method, which yields up to 2.5 to 3 metric tons of prawns per harvesting cycle (4 to 5 months) per hectare of farming-pond. Considering current selling price of US $ 10,000 per ton one can see that this is a business opportunity not to be missed. It is nicknamed: "THE BLUE GOLD". The following table 1 gives an idea about investment in tiger prawn farming: Prawn Farming On a 100 Hectares Compound / semi intensive operation Investment - US $ 6,850,000 Yields - tons 150 300 500 metric tons Turnover 1,500,000 3,000,000 5,000,000 US $ Direct cost of sales 300,000 600,000 1,000,000 US $ Operating costs 150,000 300,000 500,000 US $ Interest + taxes 700,000 700,000 700,000 US $ Net profit 350,000 1,400,000 2,800,000 US $