CATDOLL : CATDOLL: How do most fish receive sound waves?

1. What do most fish rely on to receive sound waves?

Most fish rely on their swim bladder to receive sound waves.

Fish have a lot of water in their bodies. Sound travels directly through their bodies to their ears because fish don't have eardrums. In fact, most fish don't have ears that are connected to the outside world at all. Instead, they are protected in sacs on either side of their heads, just behind their eyes. Many species of fish collect sound in another way. Their ears are connected to their swim bladders, and sound in the water causes the walls of the swim bladder to vibrate, just as sound traveling through the air causes the eardrums to vibrate.

The swim bladder acts like a multiplier, amplifying the sound in the water. The closer the swim bladder is to the otolith, the better the hearing of the fish, and vice versa.

2. What is the sentence that says the shallow lake beach is the spawning ground for fish?

The sentence "The shallow lake beach is the spawning ground for fish" is an affirmative statement.

3. How do salmon find spawning sites?

Salmon migrate to spawn, and they need a specific environment to spawn. The end point of the migration of salmon in my country is Fuyuan County, Heilongjiang Province. Salmon is a cold-water upstream spawning migratory fish. According to the time of upstream migration, it can be divided into two biological groups: summer type and autumn type. Only autumn salmon can swim upstream to China, and most of them spawn in the downstream, and only a few reach the upstream.

After the fertilized eggs hatch, the fry lurk in the dark among the gravel. When they grow to millimeters, they begin to swim down rivers and into the sea. When they reach maturity, they return to freshwater rivers and return to their original breeding grounds to lay eggs.

Usually when they reach sexual maturity, adult fish stop eating when they enter the reproductive period.

Choose a place with clear water, fast current, water temperature of 5~7℃ and gravel bottom to lay eggs.

The eggs are laid in a pit about 1 meter in diameter and 30 centimeters deep. After spawning, the parent body becomes emaciated and dies 7 to 14 days later. It reproduces only once in its lifetime. Extended information: The salmon is a species of the order Salmoniformes, belonging to the family Salmonidae, a type of salmon, and a famous cold-water upstream spawning migratory fish. There are 9 suborders, 25 families, 146 genera, 510 species, and 82 pure freshwater species.

They are born in the fresh water of rivers, but grow up in the seawater of the Pacific Ocean. Salmon are carnivorous fish, they are ferocious by nature, and they survive by preying on other fish in the sea. Migration is a special form of fish movement, which is the active, regular, directional, clustered, and species-specific horizontal movement of some fish.

Migration is also a cyclical movement that is repeated every year as fish progress through the various stages of their life cycle.

Migration is the result of fish's long-term adaptation to changes in external environmental conditions. It is also an inevitable reaction to external stimuli when the internal physiological changes of fish develop to a certain extent.

4. What are the common fish?

1. Yellow Duck Call

The scientific name of the yellow duck is Pelteobagrus fulvidraco, and it is also known locally as Huang Yagu, Huang Yagu, Huang Yagu, and Huangyajiao. It has tender meat, delicious taste, rich nutrition, no intramuscular bones, and high fat. It is a common edible fish in China and one of the most common fish in rural rivers.

2. Snakehead

Snakehead fish is a fierce fish, also known as mullet, raw fish, wealth fish, snake fish, firehead fish, black snakehead, etc. Its meat is delicious and nutritious, and it is a fish with high economic value. In rural areas, it is generally called wealth fish, which means getting rich.

3. Channa

Channa fish mostly live in lakes and shallow waters, and mainly feed on small fish, shrimps and insects. There are more than 30 species of Channa fish in China, and the common genera include the black Channa fish, the Channa fish, and the sand Channa fish. Especially in spring, Channa fish should be the first river delicacy that can be caught.

4. Carp

Carp is a primary freshwater fish that usually lives on the bottom of water bodies covered with aquatic plants in rivers, lakes, reservoirs and ponds. It is one of the freshwater fish with the most varieties, the widest distribution, the longest breeding history and the highest yield.

5. Grass carp

Among the important freshwater economic fish in China, the most important is grass carp. Grass carp is a fish that is now farmed in many areas. It is also a fish that is often seen in rural rivers and a common fish on people’s tables.

6. Silver Carp

Silver carp is one of the four major carps. Its meat is tender and nutritious. It is a species artificially cultivated in many areas and one of the main freshwater farmed fish in my country. It can often be seen in rural rivers and is deeply loved by people.

7. Crucian carp

There are a lot of crucian carp in rural rivers. Anyone who has ever fished knows that crucian carp is the easiest fish to catch. Generally, when you go out fishing, you can always bring back a basketful of them, and they are also very cheap. This fish is also one of the most common fish on the table.

8. Catfish

Catfish is still very common in rural areas, especially in relatively dirty water. Catfish are relatively large, some weighing 20 to 30 kilograms. They taste good and are rich in nutrients, so many people currently raise them in rural areas.

9. Fish

The silver carp is also called white stripe. This fish can often be caught by the river. This fish cannot live without water and will die if it is away from water for 10 minutes. The silver carp is very common in rural areas. Many people who love fishing often go to rural rivers to fish.

10. Culex

When fishing, you should be afraid of this kind of fish because it can eat up the bait very quickly and you may not be able to catch it. The scientific name of the upturned carp is "upturned carp", and because of its very distinctive mouth, it has many interesting names in the folk, such as upturned carp, carp thorn fish, white fish, pouting carp, pouting mouth, upturned white carp, upturned mouth, etc.

5. What is the largest fish?

The largest fish in the world is the shark, with a large body and cracked teeth

6. What are the characteristics of fish?

There are four main characteristics of fish: they live in water, breathe with gills, swim with fins, and reproduce by laying eggs.

1. Living in water: All fish live in water. Even though some can stay out of water for a short time, they cannot stay out of water for a long time. For example, mudskippers can go ashore to look for food when the tide is low, but they will definitely return to the water before being killed by the sun. The African lungfish stays out of water the longest. During the dry season of the river, they will burrow into the mud and hibernate with a small amount of water until water comes back.

2. Breathing with gills: One of the reasons why fish live in water is that they mainly breathe with gills. Unlike the lungs of terrestrial animals, gills need to be moist to function properly. When water flows through the gill filaments, the blood vessels inside can complete the exchange of oxygen. However, some fish can breathe with the help of other organs, such as loaches can breathe with their intestines, and fish of the family of perch have suprabranchial organs that can obtain oxygen from the air.

3. Swimming with fins: Since fish live in water, they need some means to swim. Fish fins are the helpers of swimming. They are usually divided into five categories, namely pectoral fins, pelvic fins, dorsal fins, anal fins and caudal fins. Some fish also have adipose fins. Different fins have different functions, but they can basically maintain balance. The caudal fin can also provide power and turn, which is particularly important for fish.

4. Reproduction is oviparous: Most fish reproduce by laying eggs, and a few are ovoviviparous. Ovoviviparous looks like viviparous, but it is still oviparous, except that the eggs are not hatched outside, but inside the fish body, so the fish are born small.

7. Shell fish?

Horseshoe crabs are shelled fish on Earth and are marine arthropods. They are crab-like, with a bluish-brown or dark brown body covered with a hard shell. They have four eyes, two of which are compound eyes. There are two small eyes of 0.5 mm at the front of the cephalothorax, which are most sensitive to ultraviolet light and are only used to sense brightness. There is a pair of large compound eyes on both sides of the cephalothorax. Although horseshoe crabs can flap their gills with their backs facing down to propel their bodies to swim, they usually bend their bodies into an arch, burrow into the mud, and then use their tail swords and the last pair of walking legs to propel their bodies forward.

8. A general term for fish?

A general term for cartilaginous fish and bony fish

Alias: fish. It is a cold-blooded aquatic vertebrate that breathes with gills, swims by swinging its tail and trunk and coordinating its fins, and feeds with its upper and lower jaws. It belongs to the subphylum Vertebrata in the phylum Chordata. Generally, people divide vertebrates into five categories: fish (53%), birds (18%), reptiles (12%), mammals (9%), and amphibians (8%). According to statistics by the late Canadian scholar Nelson in 1994, there are 24,618 species of living fish in the world, accounting for more than half of the named vertebrates. New species of fish are constantly being discovered, with an average of about 150 species per year. In more than ten years, more than 1,500 species should have been added. At present, there are about 32,100 named fish species in the world.

Fish are mainly divided into tropical fish, temperate fish and cold-zone fish.

Water fish are divided into: freshwater fish and saltwater fish

9. Harmless fish?

The first choice is herbivorous fish, which are small and safer. In addition, artificially farmed fish are also called edible fish, which are fed with food such as green vegetables, cabbage, fried cornmeal, wheat bran, etc., so they are also safe.

Carnivorous fish have higher mercury levels than herbivorous fish, and marine fish have higher mercury levels than freshwater fish. The older and heavier the fish, the higher the mercury levels.

10. Are whales large fish that children can raise?

1. Red Arowana: Red Arowana is a tropical freshwater fish that is relatively large in size and is well suited for being kept in large aquariums that can provide ample swimming space.

2. Tiger fish: Tiger fish is also a freshwater fish with beautiful black and white stripes on its body. Tiger fish also have a larger body size and are suitable for being kept in a large aquarium.

3. Goldfish: Goldfish is a common ornamental fish. It is large in size and suitable for being kept in a large aquarium. Goldfish are also gentle and easy to keep.

4. Conger Fish: Conger fish is also a tropical freshwater fish. It is large in size and very suitable for being kept in a large aquarium. Conger fish has lively habits and likes to swim in the water, making it very suitable as an ornamental fish.

5. Arowana: Arowana is also a common ornamental fish, cute and easy to raise. Larger Arowana is suitable for raising in large aquariums, and it is relatively simple to raise Arowana, which is very suitable for beginners.

In general, choosing large fish suitable for raising cetacean children requires considering factors such as the size of the aquarium and the difficulty of raising them to ensure that the large fish can fully grow and develop while ensuring the safety and health of the cetacean children.