Sea salt is what we use to salt our salt added products. Our salt added albacore contains 135 mg sodium per 55 g serving (with about 3 servings per 6 oz. can and 4 servings per 7.75 oz. can).  The salmon contains 240 mg per 55 g serving.
The no salt added products have small amounts of naturally occurring salt - albacore is 20 mg per 55 g serving and salmon is  25 mg per 55 g serving.