What’s the best fish to buy frozen?
Buy American seafood, preferably from the West Coast; from Alaska is even better.
Extra points if it has the Marine Stewardship Council logo. Look for labels that overload you with good info, like where the fish was raised or caught.
Why buy frozen ever?
Fish frozen at sea may be in better condition. Also, frozen fish transported by truck or ship have a lower carbon footprint than air-freighted fresh.
Best way to thaw
Overnight in refrigerator, to protect flavor and retain juices.
Immerse sealed package in a container of cool water. Change water often until fish is thawed.