and bear paws and fish
<h1>Sorry, I'm a whoop! </h1>
Welcome friends back to this little different pet fish column again, I am the fish and bear paw have both.
Yesterday I talked about the eyesight problem of the fish, and today we will talk about the hearing problem of the fish.
Can your ornamental fish hear you and your lady whisper?
Of course!
But the question is, what organ does it use to hear your voice?
Many children mistakenly think that they hear it with fish gills, because the position of the gills is exactly similar to the position of the human ear.
Unfortunately, you are wrong.
The gills are the respiratory organs of ornamental fish, not their hearing organs.
Fish have three kinds of hearing organs, some fish have all three, and most fish actually only have two of them.
Today, let's take a look at the hearing organs of ornamental fish, let's re-understand the fish, let's feel the creator's good intentions together.
Don't be impatient, and listen to the hustle and bustle.
Friendly tip: This article is suitable for avid ornamental fish enthusiasts who are eager to learn, not for those who do not seek to understand the ornamental fish killer. Expected reading 218 seconds.
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Feel the sound of fish
<h1>Do ornamental fish hear the same sound as humans? </h1>
In terms of the range of sound waves heard, the range of sounds heard by humans and fish is not the same.
Normal humans can hear the range of 16 ~ 24000 Hz, while the fish can hear the range of 2 ~ 10000 Hz, of course, different fish can hear the range is different, this upper and lower limit of the data need to be adjusted according to the specific fish species. The aural range of the vast majority of fish is 2 to 3000 hertz.
Because water is much denser than air, sound travels 4.8 times faster in water than in air, and decays slowly. This determines that the fish's hearing is actually very strong.
The speed of sound in the water is 1500 m / s, so when you go to the pond to watch the fish, in fact, the fish hear your footsteps very early, as to whether it will take care of you, it depends on the mood of the people at that time.
In addition, because ornamental fish are almost immersed in water for almost life, they receive more signals from hearing than vision, and many signals of avoidance and courtship are mostly received by the auditory system first, rather than the visual system.
The auditory system of fish, known as the "auditory system", is mainly composed of the inner ear and lateral line, and some fish are also equipped with some unique auditory plug-ins, making their auditory system appear to be gifted.
Next, let's introduce the auditory world of ornamental fish!
Fish ears
<h1>Ornamental fish ears are invisible</h1>
Ornamental fish actually have ears, as shown above, that is, the position that the boy points with his finger, it is not on the outside of the fish body, but in the head of the fish.
As I said before, there is a thing that can judge the true age of fish called "ear stones", which grow in this position of the fish.
The inner ear of the fish can help the fish feel the pressure waves caused by sound and the displacement generated by the water in the flow, which can help the fish obtain auditory signals and help the fish body maintain balance.
A part of the inner ear of an ornamental fish is called a "listening pot". There are a lot of sensory hair cells in the listening pot, which are the hair cells that can sense the changes in the pressure generated by sound waves in the water. As soon as there is a sound in the water, this hair cell will flutter, so that the ornamental fish can hear the sound.
As mentioned above, the hearing range of most fish is 2 to 3000 hertz, but some fish have hearing reversals, such as crucian carp can hear 3480 hertz, tuna can hear 5000 hertz, and catfish can hear 10000 hertz.
The reason why these fish are powerful is because they have an extra hearing plug-in in their bodies - Webb's device.
The Webb device is a signal transmission belt located between the inner ear of the fish and the swim bladder, which is simply understood, that is, this type of fish can use the swim bladder to feel the sound signal, and then encrypt the information transmitted to the inner ear through the Weber's device, and then decode it into intelligence that the brain can recognize.
Most of the fish with the Webb's apparatus live in the native environment with severely turbid water quality, and their eyesight is generally poor, but their hearing is reversed.
Suddenly, an old saying occurred to you: God will surely open a window for you if he closes a door for you.
Conclusion: The ears of ornamental fish are not on the surface of the body, but in the brain shell, which is the main hearing organ of fish. Individual fish will get an external hearing system with the blessing of the Webb apparatus, but they usually have poor vision.
Ornamental fish in the lateral line
<h1>See the mysterious lines of the fish's body surface</h1>
If you're careful enough, you can see two less obvious lines on the surface of your home's ornamental fish.
This line is intermittent, like two dotted lines, one on each side of the fish.
This dotted line on both sides of the ornamental fish is the famous "side line", and some aquarists also call it the "listening line".
In fact, he prefers the term "listening to the line", which is more graphic and more direct.
If the inner ear of a fish is regarded as an important auditory organ of the fish, then the fish's listening line is the fish's supplementary auditory organ.
The inner ear is responsible for sensing the sound waves in the water and the sound waves coming in from the outside, and the listening line is responsible for sensing the direction of the water flow and the low-frequency sound waves.
In the wild, for example, a predator is slowly swimming toward a fish that can use the lateral line to sense the danger approaching first, rather than using the inner ear.
In addition, there are many natural bugs swimming in the water, which are snacks for fish, and fish can use the side line system to detect the location of food in addition to being visible with the eyes.
In fact, we can understand it less rigorously: the inner ear of the fish is the ear of the fish, and the side line system is the detection radar that the fish comes with.
In fact, some people have done experiments: if the side line of ornamental fish is artificially destroyed, in fact, the fish can survive, but its swimming posture will become more strange, and its ability to avoid predators has also decreased significantly.
So, when we talk about the hearing problem of fish, we have to think of both its invisible inner ear and its enigmatic lateral line.
Conclusion: The lateral line of ornamental fish is also one of the hearing organs of fish, and most of the sound wave signals generated by the water flow are received by the lateral line.
Through the wonderful combination of the inner ear, the listening line and the swim bladder, the ornamental fish can hear the groans of their companions in pain, they can hear the danger signals from other fish, they can hear the courtship signals from the opposite sex, and they can also hear the sound of delicious food passing by. So, from today on, remember that ornamental fish have an auditory system, but its auditory system is not so obvious. If you say something heart-pounding to your wife at the side of your fish tank, notice that the fish hears it.
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