I took someone's advice and used 1 cup breadcrumbs instead of 1 3/4 cups and thought it tasted very good. I also added a second celery stalk. These were a delicious, healthy, and filling dinner, especially with the dill sauce.
A tip to those seeking more calcium and Omega-3s, I highly suggest leaving the bones and skin in. The bones crush easily between your fingers, and the skin breaks apart nicely - you'll never even taste it.