What is the difference between wild fish and farmed fish and what are the differences

There is still a big difference between wild fish and farmed fish. First of all, they are different in size, wild fish tend to be more slender and do not grow large, while domestic fish look fatter due to their adequate nutrition. At the same time, their body color is also different, the wild ones tend to be lighter, and the domestic ones are darker.

In addition, the feces of wild fish are less fishy, and the domestic ones are heavier.

Wild fish and farmed fish seem to be distinguishable because they are not the same overall body shape. Wild fish live in the wild and need to hunt on their own, so they may not be able to eat enough every time, and their body will appear slender and not large. Farmed fish, on the other hand, tend to grow very large because of the provision of feed at a fixed time.

Most of the wild fish live in flowing waters, the water is relatively clear, the overall color will be lighter, and the scales are relatively thin, and the appearance is shiny. Because farmed fish live in still water, there is a certain amount of silt at the bottom, so in order to better integrate into the environment, the color will be darker and the scales will be thicker.

As mentioned above, they are different in appearance and their physical shape is also due to the difference in fat content. Wild fish do not eat enough, so the fat content is relatively low, especially in the abdominal cavity, while the feed fed by farmed fish is more nutritious and the amount is also sufficient, so the fat content is relatively high.

The color of the feces excreted by wild fish is relatively light, although there is a certain fishy smell, but the smell is relatively light, while the feces of farmed fish are different, due to excess nutrition, so the color of the excrement is relatively dark, and there is a strong fishy smell.

Difference Between Wild Fish and Farmed Fish.

There is a big difference between wild fish and farmed fish, and this internal difference includes not only taste, but also the characteristics of internal organs

1. Due to the abundant feed and rich nutrition, farmed fish are generally fat and strong, while wild fish are often emaciated and slender due to full competition in the natural environment.

2. The fat content of artificially raised fish is very high, not only the abdominal cavity and fish intestines are full of fat, but even the fish skin may be a thick layer of fat, and even the fish belly is mainly fat. However, due to the lack of food, wild fish tend to have very low body fat content, less fat in the intestines and abdominal cavity, and less fat on the meat of wild fish.

3. Due to the high fat of the feed, the farmed fish will lead to high cholesterol, and the gallbladder of the farmed fish is large, with a lot of bile and a strong color. Wild fish have smaller gallbladders and less bile, and are lighter in color.

4. Due to the consumption of high-fat and high-protein feed made by artificial mixture, and the amount of food is large, regular feeding, and the digestion and absorption rate is low, therefore, the excrement of farmed fish is often black, and the fishy smell is very strong. However, due to the consumption of pure natural food, and the amount of food is small, the digestion is very sufficient, and the wild fish defecation is light in color and has a much lighter fishy smell. If you look closely at the water quality in the fish pond, you can see it.

5. The peritoneum is also the basis for distinguishing wild fish from farmed fish. Due to the feed and living environment, farmed fish often have a very dark black membrane in their belly, while wild fish have no black membrane or a very shallow black membrane.

6. Wild fish are caught, often with many varieties and different sizes, while farmed fish are often fished in batches, and there is little difference in size.

The nutrition of wild fish and farmed fish is the same.

1. Protein: The protein content of fish muscle is generally 15%-25%, the muscle fiber is thin and short, the water content in the tissue is high, the taste is delicate, and it is easier to be digested and absorbed by the gastrointestinal tract than poultry and animal protein.

2. Fat: The average fat content of fish is 1%-3%, and the specific content is related to the species, such as eel, tuna and other fat content is high, cod fat content is low, and fish fat contains a large amount of unsaturated fatty acids, which is an important essential fatty acid for the human body, and has a certain effect of reducing blood lipids and preventing atherosclerosis.

3. Vitamins: The liver of marine fish contains a large amount of vitamin A and vitamin D, which is an important part of the body's acquisition of vitamin A and vitamin D, which can promote the body's absorption of calcium, help bone health, protect eyesight and other effects.

4. Minerals: The mineral content of fish is 1%-2%, which contains iron, calcium, potassium, sodium, zinc and other minerals, which are rich in nutrients.

Fish suitable for rural farming include silver carp and bighead carp.

Grass carp, carp, crucian carp, tilapia.

blunt-headed sea bream, etc. These fish are fast-growing, adaptable, and have special feeding habits, and they are suitable for small-scale agriculture in rural areas of China.

1. Herring. Silver carp, bighead carp, and grass carp are all specialty fish in China, and along with herring, they are often referred to as the "Big Four."

Herring gets its name because of its black body color, because its staple food is snails and clams, which are not farmed much in the north, and blunt-headed sea bream is also a specialty fish in China.

2. Tilapia: Tilapia is native to Africa, and there are many types of tilapia, mainly plant-eating fish. In addition to not being cold-tolerant, tilapia is adaptable and has delicious meat. It is also a type of fish that people like to farm.

3. The claw is made of animal and plant remains and algae.

The fish that feed on it are called Xenopus toads, which are suitable for polyculture in ponds. Among them, the largest one is called the fine scale oblique jaw, Heilongjiang is also known as yellow croaker, and the south is also called "sand girl".

4. Silver carp: also known as silver carp.

The head is large, the scales are thin, the whole body is silvery-white, and the abdomen has a blade-like structure called the ventral margin. Perched in the upper layers of water, he can jump. It's easy to jump out of taunts when pulling the net.

Its mouth has a thin mesh like a gill raker, which at first glance looks like a layer of foam. When it breathes, it filters the water in the gill raker and keeps plankton in its mouth.

Silver carp have few diseases, are very strong, easy to raise, and grow quickly. The 10 cm fingerling grows to about 250 grams from spring and summer to late autumn. The meat of silver carp is very tender. Big silver carp is high in fat. With its own fat, it is enough to make fried fish from the flesh of a whole fish.

5. Bighead carp: also known as silver carp.

Because its body has a lot of black stripes, and its head is large, it is also called a fat head. The silver carp has a slow temperament and cannot jump, so it is also called bighead carp. "Yong" means not lively and active.

The gill raker in the mouth of a silver carp is much thinner than that of a silver carp. In addition, bighead carp have a large mouth and filter water much faster than silver carp, but because the gill rakers are sparse, smaller phytoplankton are easy to leak out, so silver carp mainly feed on zooplankton.

6. Carp: Carp is a relatively common economic fish, which is widely distributed in China, and has strong adaptability and is more suitable for breeding. This fish mainly lives on the bottom of the water, and there are many foods that can be accepted, and they are mainly fed with high protein such as soybean cake and silkworm pupa in captivity.

feed so that it can grow fast and grow well.

7. Crucian carp: Crucian carp is a common freshwater fish in China, in the Qinghai-Tibet Plateau.

are distributed in other waters. As an omnivorous fish, it has a wide range of feeding habits, and has strong adaptability, and is also relatively resistant to disease, coupled with fast growth rate, low temperature requirements, it is very suitable for raising in rural fish ponds, and also has good economic benefits.

8. Grass carp: grass carp grows fast, the meat is delicious, so it is also very suitable for rural fish pond breeding, itself is the middle and lower layer of fish, mainly feed on various plants, artificial breeding can choose some pellets, so that it will grow better, each feeding as long as eight points full, but also to clean up the uneaten food.

Fish species include freshwater fish, deep-sea fish, cold-water fish, ornamental fish; Freshwater fish is the best breed, the water quality requirements are not very high, as long as you ensure enough nutrient intake, clean the pond on time, and ensure adequate feeding, you can make the fish grow better.

There are grass carp, carp, catfish, hairtail, silver carp. Grass carp is best to breed, put the small fry in the water, feel very worry-free, feed the delicious good, usually pay attention to the water temperature.

There are many types of fish, such as grass carp, silver carp, carp, shark, saury, eel, cod, salmon, tilapia, and catfish. The best fish to be farmed are carp, grass carp and silver carp.

1. Back. Most of the wild fish are high-backed, and some citizens jokingly refer to them as "hunchbacks", while the farmed fish are mostly elongated.

2. Mouth. Wild fish have snout whiskers longer than the eyeball**, white or light red lips, and a white snout. The snout whiskers of farmed fish are only as long as the anterior edge of the orbit, the lips are black or light black, and the color of the snout is close to black.

The difference between wild fish and farmed fish is the difference in body shape, body color, and fat content.

1. Body shape differences

There is a big difference between wild fish and farmed fish in body shape, because wild fish live in the wild and need to hunt by themselves, and their survival pressure is greater, so the body shape of wild fish is slender and small, and the farmed fish is relatively fat and strong due to the regular feeding of feed.

2. Different body colors

Most of the wild fish grow in flowing waters, and the water quality is relatively clear, so the color of its body surface is relatively light, and the scales are thin and shiny, while the farmed fish live in still water and have a certain amount of silt at the bottom, so its body surface is dark in color and the scales are thick.

3. Fat content

The survival pressure of wild fish is high, and each predation may not be full, so its fat content is low, especially the abdominal part is more obvious, in addition, the excrement of wild fish is less fishy, and the feed nutrients fed by farmed fish are sufficient, so the fat content is higher, and the excrement has a strong fishy odor.

Principles of fish selection:

1. Look at the fish's eyes

Looking at the eyes of the fish, you can judge whether the fish is fresh or not most directly. The fresher the fish, the more bright and transparent the eye area should be, and the eyeballs should be prominent. If the color of the fish's eye looks cloudy and the eyeball is sunken, then it proves that the freshness is not enough, so buy with caution.

2. Look at the gills

The gills of a fish refer to the gills of a fish. We all know that the gills of fresh live fish are very tight, and when you open the gills, you can see that the gills inside are bright red. On the other hand, if the gills of the fish can be easily opened, and the color appears dull and rotten, then it proves that the fish is not fresh enough and is not recommended to buy.

The differences between wild fish and farmed fish are as follows:

The size and size of the fish are different: wild fish are always emaciated and small due to the relatively large competition in the living environment, and the fish body is short and strong. The farmed fish are abundant in dry feed and rich in nutrition, so they are generally fat and strong-eyed and docile.

Different body surface colors: Wild fish are light in color, with thin scales, grayish-white, bright luster, slender and narrow, with inconspicuous back and belly lateral lines, and uneven body color. The farmed fish live in still water with a certain amount of silt deposits, and the color is dark and black, and the scales are on the building side.

The fat content of the body is different: wild fish are expensive by dry food, often the body fat content is very low, the fat in the intestine and abdominal cavity is relatively small, the fat on the fish meat is less, and the fat content of farmed fish is high because the feed is high fat.

Wild fish farming methods

Trapping water in advance: If you want to raise fish, you must prepare water in advance, and the general tap water cannot be used directly to raise fish, because the water contains residual chlorine, although the content is not high, but it will also be harmful to the health of the fish. Usually, the water should be connected and put in a sunny place to dry for one to two days, so that the chlorine gas can volatilize, so as to ensure the survival of blind fish in the water body.

Rest and wait: After putting the wild fish in the water, you need to rest for a period of time, because the environment changes, the fish may have a stress response, and will not eat during the period, you can not feed it at this time, and do not change the water, try to avoid disturbing it, usually it takes three days to rest, so that it can adapt to the new environment.