Which are the saltiest fish?
The saltiest food that I would normally encounter is the anchovie, especially as used in pizza toppings (the fish itself isn't saltier than any other fish, but that is how it is prepared). You can, of course, add as much salt as you like to any kind of food that you eat. I have seen someone salt a graprefruit, believe it or not.
Don Juan Lake in Antarctica is the saltiest lake in the world. It is 18% saltier than the ocean, while the Dead Sea in Israel is only 8%. The Saltiest non-Antarctic lake in the world is Lake Assal in Djibouti. It has a 40% salt concentration level at some of its lowest points. Oceans have an average of 3.5% concentration.