As the name implies, the biggest difference between freshwater fish and marine fish lies in their growing environment. Freshwater fish, common carp, crucian carp, grass carp, silver carp, Wuchang fish, tilapia, eel and so on; Marine fish include hairtail, tuna, large yellow croaker, small yellow croaker, Spanish mackerel, salmon and turbot.

Whether it is freshwater fish or marine fish, their nutritional components are basically the same, and the total nutritional value is very high. First of all, fish is rich in protein, and the amount and ratio of essential amino acids are most suitable for human needs, so it is a good source for human to ingest protein. Secondly, fish meat contains less fat and is mostly composed of unsaturated fatty acids, and the absorption rate of human body can reach 95%, which has the functions of lowering cholesterol and preventing cardiovascular and cerebrovascular diseases. Thirdly, fish is rich in minerals, such as iron, phosphorus and calcium. Fish's liver contains a lot of vitamin A and vitamin D.

In addition, the muscle fiber of fish is very short, and the water content is high, so the meat is tender and more easily absorbed than the meat of livestock and poultry. Fish is more beneficial to people's health than food with high nutritional value but not easy to absorb.

Marine fish is slightly better in nutrition and taste.

Just because the nutritional components are similar does not mean that the nutritional values of the two are exactly the same. Marine fish has more nutrients than river fish, and its nutritional value is slightly better.

The sea is extremely rich in nutrients, especially a lot of nutrients, which makes the contents of minerals and vitamins in marine fish higher. In addition, the liver oil and body oil of marine fish contain a highly unsaturated fatty acid that plants and animals on land do not have, which contains a component called DHA (commonly known as brain gold), which is an essential nutrient for the brain and is very important for improving memory and thinking ability. In addition, the contents of omega-3 fatty acids and taurine in marine fish are much higher than those in freshwater fish, which has protective effects on heart and brain.

In terms of taste, sea fish tastes fresher than river fish. This is because the swimming range and swimming strength of marine fish are larger than those of river fish, which makes its muscle elasticity better and tastes delicious. River fish, on the other hand, tastes earthy because they grow in water with more humus. Such an environment is suitable for actinomycetes to reproduce and grow. Bacteria invade fish blood through fish gills and secrete a brown substance with earthy smell, which is difficult to get rid of during cooking.

Steamed river fish smells earthy.

Speaking of eating fish, marine fish are suitable for all ages, and steaming and braising are suitable. Crucian carp in river fish is suitable for the elderly, children and pregnant women because of its long growth period, soft meat and high nutritional value. However, some freshwater fish, such as carp and silver carp, are difficult to cover up their earthy smell when steamed, and their taste is far worse than that of marine fish.

It is best to eat sea fish cooked, and raw food will cause severe abdominal pain and allergies due to the infection of Anisodes. Eating freshwater fish depends on whether it is salvaged from polluted water. Contaminated fish contains toxins, which will do harm to health.

thank you !

References:

seafood