If lung cancer patients want to eat fish, it is better for them to eat sea water fish. In fact, no matter sea water fish and fresh water fish, the nutrients contained in them are more or less the same, but sea water fish has several advantages: first, the content of trace elements, such as selenium, will be higher than fresh water fish, and these trace elements are more important for tumor patients. Secondly, seawater fish do not need to worry too much about parasites, at the same time, seawater fish also has relatively fewer thorns, which makes the meat easier to be chewed and absorbed for tumor patients with reduced chewing and swallowing functions. Salmon, especially salmon, is more recommended in sea water fish, because the nutrition of tumor patients needs certain calories besides high-quality protein, and the calories need to be provided by fat, and the fat content of ordinary fish is very low, which is high-quality protein, while the fat contained in salmon is the calories that can be provided is relatively higher than that of ordinary fish, and it can reach a better ratio of high-quality protein and fat, which is more suitable for tumor, Lung cancer patients to use.