Just as you choose meat to be as lean as possible, choose fish to be as fat as possible. Therefore, give preference to fat fish like mackerel, herring, tuna, bogue, anchovies, sardines, salmon, trout, etc. Sardines are rich in oxalates, hence they involve some risk for kidney stones.
The benefits of fatty fish oils are numerous. Some of these are: consistently lowering of blood triglycerides; as antiatheromatous and antithrombotic agents; the prevention or treatment of coronary heart disease, hypertension, inflammatory and autoimmune disorders, arthritis, and diabetes. CT