Having meat delivered to your door is generally regarded as safe. While some people hesitate when it comes to fish and seafood, these delivery companies do everything they can to ensure that the fish arrives fresh. Most of the time, these delivery services will flash freeze the fish at its peak freshness to lock in all of the flavor and nutrients and keep it safe until it arrives. They pack it in insulated boxes with dry ice, so it will last up to 72 hours even if you don’t get it put in the freezer right away.