We hunt plenty of sea ducks here in Maine, a lot of Old Squaw and Eiders.
The popular way to cook them is to bake them with a brick inside the bird and when it’s done you toss the bird and eat the brick ! Our sea ducks taste just like low tide. Fortunately we know an old fella that has a big smoke house and he takes them and brines em up. Still fishy tasting to me though even after smoking. Wish they were better cause they are fun and easy to hunt on the coast.