Royal reds are found throughout the gulf of Mexico and along the Atlantic coast from Cape Cod, Massachusetts, to French guiana in south America (sAFMC, 1998a). in the southeastern united states the core habitat areas are located off Florida and the northeastern gulf of Mexico (gMFMC, 2004).
The answer largely depends on two factors: how large each piece of shrimp is and how you are using the seafood in your meal. A good rule of thumb is to plan for a quarter-pound per person for an appetizer, or a half-pound for a main course.
For a really great shrimp cocktail, you want to go with large shrimp. I use a 21-25 count, which means there are 21-25 shrimp per pound. Buy them deveined but uncooked. Easy-peel or already peeled is fine.
Steaming is the best method to cook shrimp because it doesn't overcook the shrimp as quickly as boiling water would.
Frozen shrimp are OK. In fact, frozen shrimp are usually better quality than fresh shrimp unless you have a local fresh shrimp fishery or local indoor shrimp farm nearby.