Rossian shrimp. The shrimp is larger than the ordinary shrimp. It is a large freshwater economic shrimp with a bluish color and a head that is larger than the body. Rocher's shrimp, also known as white-legged shrimp, Malaysian prawn, golden shrimp, Penaeus vanschii, etc., is a large freshwater economic shrimp. It is rich in nutrients, so it is known as the king of freshwater shrimps and is a common food for urban residents.