Can aquarium fish smell? How does the smell of fish come about?

Yes, fish can tell by their gills and breathe, and there is also the whiskers of fish, which they can use to eat, etc.

Aquarium fish can smell the smell, the smell of the fish is detected from its mouth, if it can't smell the taste, how can it eat?

Smell is a very sensitive sense of fish, and at night fish rely on their sense of smell to feed. Different fish also like different flavors, for example, carp likes sweet flavors. In the case of ornamental fish, farmed fish do not have such a well-developed sense of smell.

Fish also use their sense of smell to sniff out predators in the water, so they can escape and protect themselves in time.

Aquarium fish don't smell. Fish have a sense of smell by their tentacles. Fish do not have a sense of smell, and the sense of smell of fish is perceived by the tentacles around the mouth.

The olfactory organ of the fish has two pairs of nostrils, and below them is the nasal sac, from which the water enters the nasal sac and exits from the hind nostrils when the fish lives in water. Some cartilaginous fish, which only have a pair of nostrils on the side of the head, but have a good sense of smell. Fishes are ectothermic aquatic vertebrates that swim and feed with their upper and lower jaws by respiring with their gills, swinging their tails and trunks, and feeding on their upper and lower jaws, and belong to the vertebrate subphylum of chordates, and generally divide vertebrates into five categories: fish (53%), birds (18%), reptiles (12%), mammals (9%), and amphibians (8%).

According to the statistics of the late Canadian scholar Nelson in 1994, there are 24,618 species of fish in the world, accounting for more than half of the named vertebrates, and new species of fish are constantly being discovered, with an average of about 150 species per year, and more than 1,500 species should have increased in more than ten years, and there are about 32,100 species of named fish species in the world.

There are about 32,000 species of fish found in the world, and the fish live in the water, distributed in the ocean and freshwater, with two-thirds of the fish living in the ocean and the rest living in freshwater. There are 2,500 species in China, of which there are more than 100 kinds that can be used for medicinal purposes, and the common medicinal animals are seahorses, sea dragons, yellow eels, carp, crucian carp, sturgeon (swim bladder is fish maw gum), large yellow croaker (otolith is fish brain stone), liver oil (vitamin A and vitamin D) are the main raw materials. Hydrolyzed protein, cytochrome C, lecithin, brain phospholipids, etc. can be extracted from various fish meat, and the liver and ovaries of puffer fish contain a large amount of tetrodotoxin, which can be extracted from neuropathy, spasms, tumors and other diseases.

The bile of large fish can be extracted from "calcium salt of bile pigment", which is the raw material for the artificial production of bezoars. The differences between fish classes are as great as between terrestrial vertebrates. Fishes are generally considered to be sleek, spindle-shaped, streamlined, finned, gills-breathing aquatic animals, but many more species do not meet this definition.

Some fish are extremely long, while others are extremely short; Some are flattened on the sides, some are flattened; Some fins are large or complex in shape, while others are degraded or even digested; The shape and position of the mouth, eyes, nostrils, and gill openings vary greatly. Fish is an important food for humans. Overfishing, pollution and environmental change can all destroy fish stocks, which prey on fish and help control mosquito-borne diseases such as malaria.

Fish are important laboratory animals in behavior, physiology, ecology and medicine.

Both, but first of all, the sense of smell, the smell of fish is very sensitive, carp, crucian bream, etc., can be smelled within a few hundred meters. After finding food with a sense of smell, we use our vision to determine whether the food is edible, and then touch our lips to make a final judgment on whether to eat or not by touch.

Fish have good hearing. Scientists have found that although many fish do not have long ears on the outside, they have specially designed sound receivers that transmit sound waves to the fluid-filled tubular structure in the inner ear. These tubes contain special fine hairs, called cilia, that transmit sound pulses through a series of complex mechanisms and chemical reactions to the fish's brain, where they are processed.

The digestive system of fish is composed of the digestive tract and digestive glands, which already have the differentiation of the gastrointestinal tract and the obvious pancreas. Fish live in water all their lives, so their digestive organs and feeding habits are adapted to live in water.

The mouth is located between the upper and lower jaws, there are no salivary glands in the mouth, and the oropharyngeal cavity of fish has real teeth, which can actively ingest and prey, which is more advanced than that of the rotunda. The teeth on the jaws of plategill fish are transformed from shield scales, and the teeth of bony fish are divided into oral teeth and throat teeth depending on the raw part.

During the day, fish eat and perform other activities by the observation of the eyes, that is, by sight. At night, the fish's vision is very poor, so the night vision does not play a role, they only rely on the lateral line, smell, taste and touch of the body to navigate, find food and avoid danger, etc., these instincts are concentrated in the head of the fish.

Fish mainly rely on taste to find food, but sight definitely has a role, and if you want to think about fishing, it can be reflected, taste is very important!

The color of the submerged fishing beads does not have any taste, indicating that the sense of sight is more sensitive than the sense of smell.

Some fish use sight, but like sharks, they rely on their sense of smell.

Rely on vision to determine the position of things.

Fish have a sense of smell and are sensitive enough to find food through their olfactory sac and help identify their own species or other species of fish. However, the sense of smell of fish is related to the current and water quality, if the water flow is too fast and the water quality is turbid, the range and ability of the sense of smell will become smaller and weaker, and the water quality will be good and the water flow will be slow, and the range will be larger.

Fish have a sense of smell, and their sense of smell is very sensitive, they can sense the location of food through the olfactory sac, and they can find it accurately. Secondly, the sense of smell can also be used to help identify the same species and other species of fish, especially the opposite fish.

However, the fish's sense of smell also has a lot to do with the current, and when the current is too fast, the fish's sense of smell will also weaken. When the water flow is slow, the smell of the food will pass through the nostrils of the fish, and the food will be smelled in the spot.

In addition, the range of smell of fish is not fixed, when the water is clear, the range of smell of fish is relatively large, if the water is turbid, the range of smell will be reduced, and with the change of water quality, the smell of fish will also change.