Mar 01, 2017 · Shrimp feed is classified into four types from juvenile prawn to adult shrimp. Since nutritional ingredient is different, there are different feed size and length. Little shrimp needs feed 0.3-1.5mm in diameter; prawn, 2mm; adult shrimp, 2.7mm. With the growth of little shrimp, the length of granules increases to a few centimetres. G.