Hello!

First of all, hairtail is a marine fish.

The distinction between marine fish and freshwater fish (river fish) should be compared from several aspects:

1: The overall nutritional value of marine fish and river fish meat is roughly the same:

The biggest difference between river fish and sea fish is their growing environment.

In fact, strictly speaking, river fish should be called freshwater fish. The common ones include carp, crucian carp, grass carp, silver carp, Wuchang fish, tilapia, eel, etc.; marine fish include hairtail, tuna, giant carp, etc. Yellow croaker, small yellow croaker, Spanish mackerel, salmon and turbot, etc.

Whether it is freshwater fish or marine fish, their nutritional components are roughly the same, and their overall nutritional value is very high. First of all, fish is rich in protein, and the amount and ratio of essential amino acids contained in it are most suitable for the needs of the human body. Therefore, it is a good source of protein for humans. Secondly, fish contains less fat and is mostly composed of unsaturated fatty acids. The human body’s absorption rate can reach 95%, which has the effect of lowering cholesterol and preventing cardiovascular and cerebrovascular diseases. Third, fish meat is rich in minerals, such as iron, phosphorus, calcium, etc.; the liver of fish contains a large amount of vitamin A and vitamin D.

In addition, the muscle fibers of fish meat are very short and the water content is high, so the meat is tender and easier to absorb than the meat of livestock and poultry. Compared with foods that have high nutritional value but are difficult to absorb, fish is more beneficial to people's health.

Two: The nutrition and taste of marine fish are slightly better:

The nutritional content is similar, which does not mean that the nutritional value of the two is exactly the same. Marine fish contain more nutrients than river fish, and their nutritional value is slightly better.

The sea is extremely rich in nutrients, especially containing a large amount of nutrient salts, which makes the minerals and vitamins in sea fish higher. In addition, the liver oil and body oil of marine fish contain a highly unsaturated fatty acid that is not available in terrestrial animals and plants. It contains a component called DHA (commonly known as brain gold), which is an essential nutrient for the brain and plays a vital role in improving brain function. Memory and thinking skills are very important. In addition, the content of omega-3 fatty acids and taurine in marine fish is much higher than that in freshwater fish, which has a protective effect on the heart and brain.

In terms of taste, sea fish also tastes fresher than river fish. This is because the swimming range and strength of sea fish are larger than those of river fish, making their muscles more elastic and delicious. River fish taste earthy because they grow in water with a lot of humus. Such an environment is suitable for the reproduction and growth of actinomycetes. The bacteria invade the fish blood through the gills and secrete a brown substance with an earthy smell. This earthy smell is difficult to remove during the cooking process.

Three: River fish has an inherent earthy smell:

When it comes to eating fish, steaming, braised and other methods are more suitable.

Crucian carp among river fish has a long growth period, soft meat and high nutritional value. It is suitable for the elderly, children and pregnant women. However, it is difficult to cover up the earthy smell of some freshwater fish such as carp and silver carp when steamed, and the taste is far worse than that of sea fish.

It is best to eat sea fish cooked. Raw food can cause severe abdominal pain and allergies due to anisakiasis infection. When eating freshwater fish, you should check whether it is fished from polluted water. Polluted fish Contains toxins that are harmful to health.

Four: Types of marine fish:

Marine fish are divided into natural growth and artificial breeding.

Some marine fish cannot be artificially cultured. For example, among the marine fish commonly available in the market, the ones that cannot be artificially cultured include hairtail, Spanish mackerel, pomfret, yellowtail, sardine, boss fish, and small fish. Croaker, squid, and cuttlefish cannot be artificially cultured.

Seafoods that are both caught and artificially cultured include sea bass, black skirt, large yellow croaker, six-line fish, as well as crabs, jellyfish and other seafood;

Basically all of them are artificially cultured. There are flounder, goldenrod, turbot, semi-slip tongue and so on.

Five: Types of freshwater fish (river fish)

The four most famous freshwater fish we often eat in our daily lives are carp, silver carp, grass carp, and herring.

In addition, there are eels, rays, etc.

Of course, there are many other species of river fish.

Thank you~~~~