CATDOLL : CATDOLL: What are the types of freshwater fish?

What are the types of freshwater fish?

What kinds of freshwater fish are there? There are many kinds of fish in the world. Some fish can only live in freshwater. Freshwater fish can live in freshwater with a salinity of 3/1000. There are many kinds of freshwater fish. So what kinds of freshwater fish are there?

What are the types of freshwater fish? 1. Grass carp

1. Grass carp is widely distributed from Heilongjiang Province to Yuanjiang River in Yunnan Province, but except Tibet Autonomous Region and Xinjiang Province, it has been transplanted to countries such as Asia, Europe, the United States, and Africa.

2. Grass carp inhabit rivers and lakes in plain areas. Most of them live in the middle and lower water layers and near-shore areas with abundant aquatic grasses, and often forage in groups.

3. Grass carp is a herbivorous fish that mainly feeds on larvae and algae, but it will also eat some meat products, such as loach, dragonfly, etc. When fed with milk powder, it can be fed with Sudan grass, Sudan grass, Fan grass and other grasses.

2. Crucian carp

1. Carp originated in Asia and was later introduced to Europe, North America and other regions.

2. Crucian carp live in ponds, lakes and rivers. Most of them live in the muddy bottom of the river where the surface is calm and the water plants are scattered. They will forage for food independently or partially, and have the habit of migrating in smaller areas of the sea.

3. Grass carp is an omnivorous fish that often feeds on benthic small animals such as earthworms, sandworms, shrimps, crabs, etc.

3. Bream

1. Sea bream are mainly distributed in small and medium-sized lakes in the middle and lower reaches of the Yangtze River in my country, mainly in North Korea and Russia.

2. Sea bream mostly live in the middle and lower layers of open water areas with sludge and submerged plants. They like to live in free-flowing water and spend the winter in the deepest part of the water.

3. Snapper is a herbivorous fish, but its food coverage is wide. Vegetative plants such as Vallisneria, Hydrilla verticillata, and Eupatorium are often used as aquatic food. It can also eat some river bottom plant debris and a small amount of plankton.

4. Carp

1. Crucian carp is widely distributed throughout the country (except the central and western plateau areas). It is a highly adaptable fish and an excellent breeding fish and economic development fish.

2. Carp mostly live in shallow lakes and ponds with lush aquatic plants, and mostly live at the bottom of the water. However, when the temperature and water temperature are high, they will also move to the middle and high levels of the water.

3. Carp is an omnivorous fish. Adult carp mainly feeds on natural food. It will eat stems, leaves, buds and fruits, vascular aquatic flowers, diatoms and algae, shrimps, loaches and young snails.

5. Triangle Bream

1. This unique fish species is found in my country and is mainly distributed in Hainan, Guangxi, Zhaoqing City, Guangdong Province, as well as the middle and lower reaches of the Yangtze River, rivers, Heilongjiang Province and other areas.

2. Most of the triangles live in the middle and lower layers of current or artesian waters, and like to breed in waters where sandy swimming and submerged plants grow.

3. Triangle fish is an omnivorous fish that feeds on aquatic flowers and likes to eat water shells. It can also eat aquatic insects, fish, invertebrates, etc.

What are the types of freshwater fish? 2 1. The types of freshwater fish are:

Mollusca, lower fish, skeleton is entirely cartilaginous, scales are small shield scales, there are spiral valves in the intestine, cartilaginous and hard-scaled fish, bony fish, skeletal system is cartilaginous, primitive scales are bony diamonds, tail fin is crooked, there are spiral valves in the intestine, teleost fish.

2. Among the 1,050 species of freshwater fish in China, except for a few 13 species, the rest are all teleost fish.

3. Primary freshwater fish

Fish that can only live in fresh water throughout their lives. They account for 33.1% of the world's total fish species, about 8,600 species.

For example: catfish, monkfish. Fish that spend most of their lives in fresh water, occasionally moving or living in brackish water or seawater. They account for 8.1% of the world's total fish species, about 2,100 species.

Freshwater fish refers to fish that can live in freshwater with a salinity of 3/1000.

In a narrow sense, it refers to fish that have only a "juvenile" or "adult" stage in their life history, or must spend their entire life in freshwater. There are about 26,000 known fish species in the world, and about 8,600 freshwater fish species. There are nearly 3,000 species of fish in my country, of which more than 1,000 are freshwater fish.

There are more than 26,000 known species of fish in the world, which is the largest category of vertebrates, accounting for about 48.1% of the total number of vertebrates. Most of them live in the ocean, and there are about 8,600 species of freshwater fish.

What are freshwater fish?

1. Grass goldfish, this is the most traditional type of goldfish in China and the most common fish in the market. They are flat all over, more agile, cheap and easy to raise.

2. Tiger-head goldfish is chubby and very cute. The round bag on its head is also very cute. It comes in many colors. Sometimes you can choose more than one color, which looks very good.

3. Guppy. This is a fish that many novices will buy. It is also a tropical fish with bright colors and a small body. It can be raised together with other fish because it has a very gentle personality.

What are the types of freshwater fish? 3 Freshwater fish can be divided into aquatic plants, omnivores, plankton-feeding species, mild carnivores and others.

1. Aquatic plants are the main food: grass carp, bream, triangular bream, red-eye trout, etc.

2. Feed on planktonic fish: silver carp, bighead carp, etc.

3. Omnivorous: carp, crucian carp, etc.

4. Mild carnivorous fish: red carp, Mongolian red carp and black carp, etc.

5. Other categories: wheatear fish, loach chain, Da's snake, silver carp, striped fish, stick fish, yellow eel, white eel, flower loach, loach, catfish and common ferocious fish such as black snakehead and mandarin fish, etc.

Freshwater fish structure

Fins are essential tools for fish to swim. There are five types of fins: pectoral fins, pelvic fins, dorsal fins, anal fins, and caudal fins.

Pectoral fins and pelvic fins: help change direction and stop swimming, and maintain body balance. Some are very special: the pectoral fins of mudskippers can support the body and even be used as feet to walk.

Dorsal fin and anal fin: maintain balance and reduce resistance.

Tail fin: generates forward momentum.

What are the types of freshwater fish? 4. What are the types of freshwater fish?

1. Freshwater fish generally refers to fish that live in waters with salinity below 0.05%. There are more than 8,400 species of freshwater fish in the world, with the most common species being Cypriniformes (about 2,420 species), Siluriformes (about 2,210 species), and Characins (about 1,330 species). There are more than 850 species of freshwater fish in my country, with the most common species being Cypriniformes (about 600 species) and Siluriformes (more than 80 species). Common species include black carp, grass carp, silver carp, bighead carp, crucian carp, carp, bream, bream, silverfish, catfish, catfish with whiskers, snakehead, mandarin fish, etc.

2. Freshwater fish can be classified into primary freshwater fish, secondary freshwater fish and peripheral freshwater fish according to the salt concentration in the water.

3. Primary freshwater fish: refers to fish that can only live in freshwater throughout their lives. There are about 8,600 species, accounting for 33.1% of the world's fish.

4. Secondary freshwater fish: refers to fish that live in fresh water most of their lives and only a small part of their lives in brackish water or sea water. There are about 2,100 species, accounting for 8.1% of the world's fish.

5. Peripheral freshwater fish: refers to fish that live in seawater or brackish water, and can also live in fresh water or enter brackish water. There are about 160 species, accounting for 0.6% of the world's fish.

2. The difference between freshwater fish and marine fish

1. The salt concentration in the body tissues of freshwater fish is higher than the salt concentration in the living environment (fresh water has a low salt concentration and a small density). Therefore, fresh water from the outside will enter the body of freshwater fish, and freshwater fish need to excrete excess water through the kidneys.

2. The salt concentration in the body tissues of marine fish is much lower than the salt concentration in the living environment (seawater has a high salt concentration of about 35%, and has a high density). Therefore, the water in the body tissues of marine fish will continuously seep out from the gills and body surface.

In order to maintain water balance in the body, marine fish need to continuously swallow large amounts of seawater from the outside to make up for the lost water. However, swallowing a large amount of seawater will cause the salt content in the body of marine fish. Therefore, most marine fish need to rely on the "chloride-secreting cells" in the gill tissue and the kidneys to excrete excess salt.