How Much Salt Does Fish Have?

How Much Salt Does Fish Have? Finfish. Finfish naturally contain low quantities of sodium. Types of finfish include catfish, cod, salmon, tuna, halibut, flounder, red snapper, haddock, perch and whiting. Fresh finfish is a low-sodium food choice, ranging from approximately 40 milligrams to less than 140 milligrams per 3-ounce serving. What foods are high in