Unless you are sure the shrimp is "fresh-off-the-boat" (never frozen), frozen raw shrimp is superior to thawed seafood counter shrimp, says Olga's Flavor Factory .
Shell-on shrimp provides better flavor and prevents overcooking. buy shrimp
Shrimp is sold by "count" (e.g., 21/25, which means 21–25 shrimp per pound). The lower the number, the larger the shrimp, say Facebook groups. Unless you are sure the shrimp is "fresh-off-the-boat"