These are extra-jumbo whole farmed white shrimp sold by the pound, with the head and shell fully intact. The 6/9 count designation means there are 6 to 9 shrimp per pound, placing them among the largest shrimp sizes available at retail. Selling them whole and head-on preserves maximum flavor and is preferred for dishes such as boils, grills, stir-fries, and traditional preparations where the head adds richness to broths and sauces.

Farmed white shrimp (Litopenaeus vannamei) are widely raised in aquaculture operations, commonly in Ecuador and Southeast Asia, and are known for their mild, slightly sweet flavor and firm texture. Keeping the head on during cooking releases natural fat and umami compounds that enhance the overall dish. The shrimp are sold fresh at the Costco seafood counter by the pound, allowing customers to purchase the exact quantity needed.