Why don t river crabs eat fish, what fish will eat crabs

River crabs usually feed on small fish, shrimp, aquatic insects, aquatic plants, etc., and sometimes they also eat larger fish. However, there may be the following reasons why river crabs sometimes do not eat fish:

1.Food**: If the food of the river crab is adequate, they may not eat all the fish at once. When river crabs have enough other food**, they may choose other foods instead of fish.

2.Fish size: If the fish are much larger than river crabs, river crabs may not choose to eat them because they may not be able to hunt or digest fish of this size.

3.Types of fish: Different fish have different tastes and nutritional values, and river crabs may be more interested in some types of fish and less interested in others.

4.Behavioral habits: Different river crab individuals may also have different behavioral habits, some may prefer to eat fish, while others may not.

In short, whether river crabs eat fish or not is not absolute and is affected by a variety of factors.

First of all, the river crab eats fish, and it should be because it is frightened, causing it to take other animals as shelter!

Crabs live in the water and like to eat dead fish, dead shrimp and other decaying animal carcasses in the water, and the crab will be infected with certain bacteria in the body. In particular, river crabs mostly grow in dirty river ponds, and there are a large number of germs inside and outside the crabs. Live.

Not yet acclimatized, so there is no appetite.

After getting used to it, they will naturally catch those small fish and eat them.

There should be quite a few, No** may be the scientific name of Crab Tiger.

Eleotridae Eleotridae is a fish of the genus Bostrychus.

The picture below shows the Chinese pond snakehead bostrychus sinensis, commonly known as the Chinese pond snakehead, mullet, salmon, bamboo shoot shell fish, earth fish, crab tiger.

<> Chinese snakehead inhabits brackish and freshwater waters in shallow seas, inner bays and estuaries, and also enters freshwater and overwinters in the mud and sand bottom in winter. It is ferocious and feeds on small fish, shrimp and crabs, aquatic insects and shellfish. It is distributed in the southern Yellow Sea, the East China Sea, the South China Sea and the waters of Japan.

It has strong vitality, wide adaptability, strong disease resistance and fast growth, and is an excellent variety of artificial breeding.

It has strong vitality, wide adaptability, strong disease resistance and fast growth, and is an excellent variety of artificial breeding. In addition, the biggest feature of the fish is that it can keep one week without dying under damp conditions, and it is one of the good seafood varieties suitable for live transportation and export to earn foreign exchange.

Crabs eat small fish, but some carnivorous ferocious fish can eat crabs, such as catfish. Blackfish, etc.

Crabs eat fish. The vast majority of crabs are omnivorous. Some crabs are carnivorous, such as pike crabs.

It can prey on fish, shrimp and molluscs.

Wait. A few crabs, such as the crab, scrape or filter feed on algae.

and organic detritus.

A small group of crabs breed entirely in freshwater, and they mostly inhabit the rocks of mountain streams. There are also a few crabs, such as ground crabs, that can adapt to life on land, burrowing in damp mud holes, and migrating to the sea during the breeding season.

Crab feeding:Feeding management of crabs, river crabs.

He likes to eat fresh ingredients. For this reason, the daily feeding management prohibits those feeds that have been stored for a long time and deteriorated. At this stage, it is still necessary to put meat feed as the mainstay, and use some nutritious vegetarian food in moderation.

In particular, use more plant-based feeds to ensure good water quality in the pond. The number of times the material is used should be determined according to the change of climate temperature. In the hot summer, feeding in 1 2 times is OK.

The exact number depends on the weight of the crab. If there is any uneaten residue, it should be salvaged immediately to avoid deterioration and affect water quality.

Many people think that crabs belong to seafood and should only exist in the sea, but in fact, the small river in freshwater is also the living environment of crabs. As long as the river water is not polluted, river crabs can be eaten. It's just that the nutrients in the river are far less than those in the ocean, and the crabs in the river are not as large as the crabs in the sea, and the meat quality is not as delicious as the crabs in the sea.

Hope it helps.

Summary. Hello, glad for your question. River crab feed fish do not eat: 1. Feed river crabs with meat skin, the feed conversion rate is low, and the fat content in the meat skin is high, and it is easy to form a layer of oil film on the surface of the water body after a large amount of feeding, which is easy to cause hypoxia in the water body and affect the growth of river crabs.

Hello, glad for your question. River crab feed fish do not eat: 1. Feed river crabs with meat skin, the feed is low in the rate of hail and hail, and the fat content in the meat skin is high, and it is easy to form a layer of oil film on the surface of the water body after a large amount of feeding, which is easy to cause hypoxia in the water body and affect the growth of the river destroyer crab.

2. River crabs do not like to eat potatoes, and after a large amount of feeding, they sink at the bottom of the pond and deteriorate, which is easy to cause deterioration of water quality and induce crab diseases.

3. After being frozen for a long time, a large number of germs breed. Long-term feeding of large quantities of marine fish has a high morbidity and mortality rate of river crabs. At the same time, the salt content of marine fish is high, and the gonadal development of river crabs after feeding is accelerated, and the sexual maturity is advanced, which affects the market specifications of river crabs.

The above is the introduction of the types and reasons for feeding river crabs, and whether it has an impact on the environment and health of river crabs when preparing river crab feed.

I have fish in my crab pond grass carp I'm going to feed corn pellets How to avoid fish eating pellets.

There is no way to avoid polyculture.

Are there any additives added to the pellet that crabs eat but fish don't?

No matter what medicine is brewed, it is easy to dissolve in water, and it is not very friendly to other organisms.

There's nothing that fish don't like.

Fish don't like bitter and spicy food, but these are washed away when they get into the water, and it affects the taste and makes it easy for river crabs not to eat them.

Dead crabs produce large amounts of histamine in their bodies. Human consumption of dead crabs will cause group sleepiness amine poisoning. Because histamine is an allergic poison, it can also be said to be allergic food poisoning. Don't think it's okay to eat just a little bit of dead crab meat.

People who are allergic to histamine can cause a reaction even if they take a bite. For example, after eating a dead crab for 10 minutes and 3 hours, symptoms will appear, such as redness of the cheeks, flushing of the chest and Wang Tongpei's whole body and conjunctival hyperemia, as well as headache, dizziness, chest tightness, general fatigue and irritability.