They said fluke is an underrated fish, and deep-fried calamari may lack flavor. The chefs suggested avoiding seafood specials, as they could be hiding old fish. Grilled mackerel is usually flavorful.

At this point in our an-app-for-everything world, it’s possible to get just about anything delivered to your doorstep. If you’ve been hesitant to order seafood online because you’re worried about ...