Aquacultured crustacean and method of producing same

A method of producing an aquacultured non-sand-burrowing crustacean, comprising:

• rearing a non-sand-burrowing crustacean in an aqueous environment using a floc comprising nitrifying bacteria such that abdominal muscle of the non-sand-burrowing crustacean reaches a total free amino acid content of not less than 2400 mg per 100 g, a glycine content of not less than 550 mg per 100 g, and an alanine content of not less than 140 mg per 100 g;
• and
• terminating the rearing of the non-sand-burrowing crustacean in the aqueous environment after the non-sand-burrowing crustacean reaches the total free amino acid content, the glycine content and the alanine content,
• wherein the rearing of the non-sand-burrowing crustacean in the aqueous environment using the floc includes rearing the non-sand-burrowing crustacean in the aqueous environment using the floc for at least 43 days in a shading condition of an illuminance of not more than 100 lux at a central part of a tank providing the aqueous environment, the non-sand-burrowing crustacean is a Pacific white shrimp, the rearing includes feeding a blended feed formulated and/or selected such that the blended feed is given to the Pacific white shrimp in the aqueous environment, the aqueous environment is seawater, and the blended feed is a blended feed comprising wheat flour, soybean cake, fish meal, fish oil and vegetable oil such that the blended feed has contents of the wheat flour, the soybean cake, the fish meal, the fish oil and the vegetable oil formulated for the non-sand-burrowing crustacean.