Why are fish in the deep sea so ugly?

Their bodies have protective and warning colors.

Deep-sea animals: Deep-sea animals that live in waters from the outer edge of the continental shelf to depths of up to 200 meters. In addition to this, deep-sea animals also have animals that are found on the continental shelf.

The competition for deep-sea survival is not more shallower, and primitive deep-sea animals have survived to this day. Why are fish in the deep sea so ugly? <>

There are three main reasons why deep-sea creatures, or terrestrial creatures, have a strange appearance:

Protective color: Plants integrate the color of the body surface with the surrounding environment, which is called protective color. Many creatures in nature rely on protective colors to escape from predators and protect themselves in the process of survival.

Warning color: Plants are formed in the process of evolution, and their body color makes enemies identify and threaten them with their own venom and poison needles to avoid being attacked. Poisonous moth larvae, most of which have color, are swallowed by birds and will stab the bird's mouth, and this color becomes a warning color of birds; Poisonous mushrooms, which prevent accidental ingestion, produce a special color for the warning of herbivores.

Deep-sea fish are basically like this, they will be colorful; Deep-sea pressure is also one of the factors that makes deep-sea fish look so ugly, and their physiology changes in order to adapt to the environment. The changes are most pronounced in the muscles and bones of deep-sea fish. Due to water pressure, fish bones become thin and bendable; Muscle tissue becomes pliable and fibrous tissue becomes fine.

Interestingly, the skin tissue of the fish becomes a membrane, and the physiological tissues in the body are filled with water, maintaining a balance between the internal and external pressures generated by the water.

Not only that, but deep-sea fish have very peculiar eyes. Fish in the deep sea have eyes on the back of their heads, otherwise there are no eyes. Deep-sea fish with large eyes have eyes that occupy the main position of the head, can move in 360 degrees, and the structure of the eyeball is similar to that of today's telescopes, and the distance can be adjusted freely.

Those who don't have eyes rely on other senses to survive. Peculiar eyes are a common physiological feature of deep-sea fish.

These are the main reasons why deep-sea fish are so ugly.

The reason why the fish in the deep sea are extremely ugly is because they have evolved over thousands of years, so that they can better protect themselves, so they are extremely ugly.

Because the deep-sea environment is very harsh, deep-sea fish can only better adapt to the deep-sea environment, so the fish in the deep-sea are extremely ugly.

Because of the living environment, there is no one to see in the deep sea, there is no light, and there is little food to eat, so the body looks ugly.

Discover the strange and mysterious fish of the deep sea.

Deep-sea fish are ugly, and some people joke that "you can't see them in the deep sea, so you can grow them as you like!" There is some truth to this, but it is not entirely true. Darwin's "Theory of Evolution" put forward the idea that organisms carry out "survival of the fittest", in fact, the appearance of deep-sea fish is closely related to the living environment.

In the deep-sea environment, there is no light, the temperature is low, and the pressure is strong. In order to adapt to the environment, the physiology of the body of deep-sea fish has changed a lot.

In the process of biological evolution, efforts are made to strengthen useful functions and weaken useless functions. There is basically no light in the deep sea, so the eyes of the creatures are basically completely degenerated, and the bright colors are deterred and warned, mimic and protective, courtship, which is tantamount to brocade nocturnal walking, which is useless, so the small fish are too lazy to spend effort to dress themselves, so they gradually degenerate and tend to be consistent with the environmental color. The deep sea has a vast area and a complex environment, which is conducive to biodiversity.

Small-scale hybridization, large-scale isolation, each organism has evolved to fit only a certain environment, and even the same type of organism will present a variety of shapes.

However, if we know them well enough, we will find that each of their equipment has its own purpose. There is less food in the deep sea and less light. The eyes are large and can receive more light.

With a lot of tentacles, you can feel food more sensitively. The teeth are long and dense, which ensures that the food that is hard to catch will not run away. The mouth is upward, indicating that the fish is preying from the bottom up.

Therefore, although the appearance of deep-sea fish is scary, it is suitable for the deep-sea environment.

On the other hand, the reason why we think that deep-sea fish are not good-looking is because our aesthetics have inertia, because we live in a very different environment from them, and we are used to the creatures we usually come into contact with, forming a fixed aesthetic, so we are surprised by the appearance of rare deep-sea creatures.

So, are all deep-sea fish ugly? Of course not, there are also beautiful fish in the deep sea, such as the eastern star grouper, and the two-color strawberry fish is very cute.

Deep-sea fish are generally ugly, which is related to the environment in which deep-sea fish live, because in the deep sea, the pressure is too great, and these fish grow like this in order to adapt to the pressure.

Because there is no light in the depths of the seabed, and these fish have evolved to be very ugly in order to survive, so that predators will have a sense of fear when they see them, so they have made themselves very ugly in the process of evolution for a long time.

In order to adapt to life in the deep sea, some organs of fish will slowly degenerate over a long period of time, so they will grow ugly.

This is because they sometimes fight with other races in order to survive, and it is certain that they will be injured, so it will gradually affect their beauty.

Because there are some factors in the deep sea that can cause some changes in the fish, which also leads to some fish that are not very good-looking.

Why are deep-sea fish so ugly?

In fact, whether it is a deep-sea creature or a terrestrial creature, the reasons for its peculiar appearance are nothing more than the following three points:

1) Formation of protective color: It refers to the color of the plant to change the color of the body surface to be similar to the surrounding environment, which is called protective color. There are many creatures in nature that rely on protective colors to avoid enemies and save themselves in the competition for survival.

2) Formation of warning color: In the process of evolution of animals or plants, its bright and dazzling body color can make the enemy easy to identify, so as to use its own venom, poison needle, etc. to prevent itself from being attacked. For example, the larvae of the poisonous moth, most of them have bright colors and patterns, if they are swallowed by birds, their poisonous feathers will stab the oral mucosa of the birds, and the larval color of this poisonous moth becomes the warning color of the birds; There are also brightly colored poisonous mushrooms, which are colored as warnings to some herbivores in order to prevent accidental ingestion.

Sea fish are nothing more than this, they will be colorful and colorful.

In addition to these reasons, there is also the deep sea pressure. In order to adapt to the environment, the physiology of deep-sea fish has changed greatly. These changes are reflected in the muscles and bones of deep-sea fish.

Due to the tremendous water pressure of the deep-sea environment, the bones of the fish become very thin; And it's easy to bend; The muscle tissue becomes particularly flexible and the fibrous tissue becomes surprisingly fine. What's even more interesting is that the skin tissue of the fish becomes just a very thin membrane, which fills the physiological tissues of the fish with water and maintains the balance of pressure inside and outside the body.

In addition, the eyes of deep-sea fish have become very peculiar. Fish that live in the deep sea either have eyes on the back of their head or they don't have eyes. Fish with large eyes occupy the "fortress" part of their head, can move up and down, left and right, and have an eye structure similar to that of a telescope, and can adjust the focus freely.

Fish without eyes rely on other sensitive senses to find objects. The peculiar eye structure is almost a common physiological feature of deep-sea fish.

It can be seen that in order to adapt to the environment, deep-sea fish have changed their body structure in continuous evolution, only in this way can they survive, and their body shape is only suitable for living in the deep sea.

Deep-sea fish are not what they want, because the water pressure they face is too great. Below 200 meters above sea level, the pressure can reach 20 times that of the atmosphere at sea level, and the pressure on those fish living hundreds or thousands of meters underwater can be imagined.

This is due to the relatively high environmental pressure of deep-sea fish, coupled with the influence of the environment, and the temperature of the deep-sea is relatively low, so it will look so ugly.

The main reason for this is that these deep-sea fish mainly live in Shanghai, where there is no sunlight, which also leads to the appearance of deep-sea fish, and because the pressure of the deep-sea is particularly large, it also has a certain impact on their bodies.

Scientists have discovered that the deep sea is not as barren and lonely as people think. Under the extreme pressure of the deep sea, there is still a world full of life.

On the surface of the earth, peopleThe atmospheric pressure we are subjected to is 1 atmosphere, which is 1 kilogram per square centimeter. The density of water is greater than that of air. If a person dives below sea level, the pressure of the sea increases by about 1 atmosphere for every 10 meters of sinking.

In the vicinity of the Galapagos Islands seafloor hydrothermal vents, where the pressure of the sea water reaches 250 atmospheres, equivalent to more than 250 kilograms per square centimeter. Scientists have analogized that such tremendous pressure is equivalent to putting an elephant on your toenail cover。The deep sea (often defined as the ocean at a depth of 200 meters below sea level) accounts for 2 3 of the habitable habitat on Earth, and the deep-sea environment is extremely harsh.

In the dark, icy depths of the ocean, the pressure of the sea is huge enough to compress a polystyrene foam cup to the size of a thimble.

The earliest research on the adaptability of marine organisms to stress began in the late 70s of the 20th century, when scientists compared the proteins of shallow-water fish with deep-water spiny fish. Some scientists have also discovered that the key to the extreme stress of deep-sea animals is that they have a substance called lactate dehydrogenase (LDH) in their bodies - the LDH of Qixiao shallow-water fish can only adapt to lower pressures at depths of less than 500 meters; In contrast, the LDH of deep-sea fish is able to adapt to the enormous pressures of the sea at greater depths. At the same time,Piezolates were discovered to help deep-sea organisms adapt to stress, which effectively prevents the distorting effects of seawater pressure on proteins.

In addition, scientists have studied a molecule called trimethylamine oxide (TMAO) that shows:When TMAO is added to fish tissue samples, it can have a high and stable effect on proteins that are subjected to high pressure. Scientists have found TMAO in sharks, bony fish, crabs, and shrimp. In fact,It is also this substance that gives fish and shrimp a fishy smell

Scientists believe that the study of deep sea exploration can give us more insight into how marine life responds to the changing outside world. For the creatures that live in the ocean, since there is no way to avoid and escape these changes, they must learn to cope with and adapt to these changes.

1. In order to adapt to the low-temperature, high-pressure and dark environment of the deep sea, the distinctive forms formed in the process of evolution;

2. In order to adapt to the environment, the physiological functions of deep-sea fish have undergone great changes. Due to the tremendous water pressure of the deep-sea environment, the bones of the fish become very thin; And it's easy to bend; The muscle tissue becomes particularly flexible and the fibrous tissue becomes surprisingly fine.

3. In order to adapt to the dark environment of the deep sea, fish living in the depths of the ocean need to identify their kind, find mates and forage for food in extremely dim light, which requires them to have the ability to shine;

4. The eyes of deep-sea fish have also become very peculiar. The eyes of ordinary fish mostly grow on both sides of the head, while the eyes of the back fish that live in the deep sea grow on the back of the head, and this kind of fish eye can turn up and down, left and right.

Anyway, the lights are blind, and they can't see each other's faces, so they just grow up, hahaha......Experts explain three reasons:

The first point is that deep-sea fish have a scarce amount of food. Scarce is expensive, the lack of food makes these fish compete with each other, whoever looks vicious will have the advantage, coupled with the lack of sunlight in the deep sea, resulting in most deep-sea fish are dominated by plankton carcasses, so the deep-sea fish evolve more and more hideous.

The second reason is that the water pressure on the seabed is high, and anyone who has dived knows that as the water depth increases, the water pressure will increase accordingly. Deep-sea fish are squeezed by the sea all year round, and their original cute appearance has been squeezed out. As a result, deep-sea fishing tends to catch ugly fish with slimy appearances, with eyes, mouths, and noses all connected.

The third reason is that the deep sea is extremely dark, which is equivalent to a closed room without a single light source. As a result, many fish with light bulbs on their heads have evolved in the deep sea, and some fish have glowing around their bodies. What is laughable is that because it is extremely dark, you can't see who is with whom until you get close, and you don't need to look at it.

The deep sea is very stressful, and it grows like this to regulate the body's anti-stress effect.

There is no light in the deep sea, and it is safe to look so bright and bright, and it is safer to have dark colors.

Then there are fish in the deep sea that evolve more slowly. Compared with shallow fish, there is more information, especially with humans, so the evolution is faster, and the excellent side of protein has all evolved!

Deep-sea fish, on the other hand, have little contact information, slow evolution, and protein appearance is in the primary or intermediate stage. So it's a little weird.