Early introduction: 11034 meters of water pressure is 1100 times the atmospheric pressure, only 4 degrees, but there are millions of sea urchin nomadic herders
The sperm whale popsicle is still diving. At a depth of 500 meters, even the clearest tropical seas are left with the faintest light. The light is so faint that the human eye cannot detect it, but other creatures can see it. Surviving in the micro-area depends on being able to hide between seeing and not being seen. Spiny silver axefish are experts in hide-and-seek, and they have large, sharp eyes that can detect the presence of prey. But their bodies were flattened, and their bodies on either side shone silver like a shiny newly ground axe. They are clearly visible when they are directly opposite, but just after they turn around, their sides will be like mirrors, reflecting the faint blue light from the sea, and it will disappear into the light. From the side, the fish are in good camouflage, but what about from below? Many predators have tubular eyes that can identify the silhouette of their prey in the faint sunlight in the faint light. But the silver axefish have a way of fooling any eye searching under them. They have a kind of glowing cells in the abdomen, called light-emitting organs, which use light-emitting organs to create colors similar to the skylight under the surface of the water. The anti-shadow device destroyed its silhouette, making it almost impossible to find any trace of it from below.
However, this is only "almost". Beneath it is a pair of eyes that are unusual, and the pair of huge yellow "glasses" allow their owners to clearly identify the natural sky light and the light produced by the luminous organs. In an evolutionary race that lasted for millions of years, the device that evolved to escape was cracked by another predatory device. The bespectacled deep-sea fish prey on the silver axefish, and this rare deep-sea fish doesn't even have a name.
The sperm whale dives deeper and deeper, and the creatures become more and more rare, approaching the thinnest layer of oxygen. Reaching a depth of 700 meters, here is the thinnest layer of oxygen, and the oxygen content has dropped to 150 ml per cubic meter. Oxygen content is very sparse, and usually few organisms can survive this extreme hypoxia, so there are only a few organisms in this hypoxic layer. The further down you dive, the lower the temperature, the 800 meters underwater the water temperature is only a few degrees Celsius, and the popsicles only have a thin ten-centimeter skin to resist the cold. But in order to forage, the sperm whale traveled to a depth of more than 1,000 meters. It's a dark zone where no sunlight can penetrate it, and the temperature of the sea drops below four degrees Celsius, and the pressure is a hundred times higher than on land, squeezing the whale's lungs to only one percent of its original capacity. The creatures that float in this dark abyss are even more wonderful, they may be creatures that have been floating here for millions of years, they will always be so magical. (Deep Sea Video: The Deep World Of HumanIty's First Snoop: Ghosts Dancing) A hydra hovers in the dark waters like a milky way. Its gelatinous body helps to prey, so the hydra can extend its long tentacles like fishing lines, and it twitches crustacean-like bait to lure prey. It uses flocculents with prickly tentacles to increase the range of predation.
In this dark and dangerous world, life is rare, but there is no shortage of alternatives. Many of the animals here are dark red, like the deep sea wake called "Big Red", which reflects brilliant colors like fireworks. Usually no red light can penetrate here, so animals with red pigments on their bodies appear to be completely black here, completely invisible in the dark. However, predators here do not rely on their eyesight to catch prey, many of which have small eyes, but their long, sticky bodies are covered with organs that can detect tiny fluctuations in the water. The half-meter-long monster is called the Hairy LanternFish, and this is the first time a sperm whale has encountered it. Its body was covered with hundreds of sharp antennae, each of which could detect any prey that carelessly swam past the stationary hunter; the other, arguably the most peculiar of the known deep-sea fishes, a one-meter-long and highly sensitive tail fin, hanging down from its half-length head, its eyes were small, but its mouth was enormous.
Because there was no movable upper jaw, its huge jaw was loosely attached to its head and never closed its mouth. When stationary in the water, its blood basin can eat any creature that passes by it, regardless of its size, and thus it gets the name "umbrella-mouth devourer" in the west, and in the Chinese it is called "broad-throated fish". The prey that is swallowed is put into a bag in the jaw like a fish swallowed by a pelican, so in the West it is also called the pelican eel, devouring the eel. This eel has no ribs and relies on a whip-like long tail to move. The ends of the long tail can glow and can be used to attract prey. However, do not misunderstand that it mainly eats large animals, in fact, its main food is still slowly swimming small fish, small shrimp, etc., and it is still a minority when eating a meal of prey of its own size. In the deep sea where three meals are not followed, there is a large mouth like a net pocket, which is a very advantageous feature. The fauna of the abyss, living in darkness, lonely and hungry.
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Almost all deep-sea fish emit light in one way or another. In order to survive in the deep sea of the predatory, some fish have evolved searchlights, which are born in the light emitter under the eyes and can be used to find prey in the dark. But when survival is threatened, the prey also has a corresponding defensive move. Biolight is as useful when fleeing as it is when attacking. There are several special kinds of shrimp that begin to spin as soon as they perceive danger and can spit out biological cold light liquid, not only like a guard system to scare the fish to attack, but also try to confuse predators, like flashes on the face, blurring the original face. This also blinds the attacker temporarily, or even makes the fish that wants to eat it glow in the dark, exposing itself to its enemies, and allowing the larger predator to eat its natural enemies – like marking these bandits with a bright light and letting the police capture them. Not only that, but these luminous liquids will also be attached to the surface of the predator's body, so that the predator's whereabouts can be observed at any time.
But bioluminescence does not completely guarantee that they will not be attacked, after all, there are many kinds of creatures that have the ability to emit light. Creature cold light is used as bait to confuse enemies. However, experienced predators have become aware that luminous creatures are their predators. When the lanternfish's light is on, its black shadow disappears, and it escapes without a trace, which is called the anti-shadow effect, which is a good way to effectively avoid detection; moreover, it is not only the lanternfish that has this function. But marshal hand squid and other deep-sea predators can search for black shadows and lock on to avoid the dazzling light. However, the Marshal Hand Squid may also be attacked by larger predators, its body is transparent, but it has two eyes that are highly sensitive in the dark, and it looks quite obvious, but it also has similar functions to the lanternfish, with a luminous body under the bottom of each eye, when the luminous body is lit, its black shadow disappears, and it can blend into the background.
But the sharpest eyes in the deep sea belong to a giant-shaped animal. Although it is the size of a bean, it is already a giant among mesozoic animals.
Copepods are their favorite, and they are constantly looking for the light emitted by copepods. But copepods have a blindfold to deal with giant shapes, they will release biological light liquid, like a depth charge, and the time of flashing will be delayed. The confused giant shape wandered around in the water, chasing light and shadow, while the radium disappeared into the darkness. However, the ultimate bio-light defense weapon belongs to the melon hat jellyfish, which will flash blue light all over its body when encountering enemies, and there is a light show like fireworks, which is said to scare off the enemy.
Most of the biological light in the deep ocean is blue or blue-green, but some carnivorous fish produce red light. The black bonefish, which has a completely different way of emitting light, emits a red light through the two small organs in front of it. When the red light shines, the red prey in the dark is invisible; here the red light is rare, so the other species of fish in the sea can hardly see the red light, so it uses this way to find the prey. When it finds its prey, it simply opens its jaw and swallows its prey.
Like the black bonefish, they also have the infrared telescope of the blocker, which emits a search light that is invisible to the target, while an imitation of the stinging flea is not alert and walks on the road of no return. Other glittering highlights are emitted by other immersive stinging fleas, which release a time-lapse glow like a depth bomb, and enemies chasing the light are inevitably deceived.
There are animals in all layers of the ocean that have bio-cooling light, but the deeper the water layer, the higher the importance of bio-cooling light. This is the only way for deep-sea creatures to communicate. Ninety percent of the deep-sea animals that live hundreds of meters deep are able to emit light on their own, and for them, this is the treasure weapon they rely on to survive in the dim underwater world.
Deep-sea creatures use light differently, communicating with each other to avoid predators, attract prey, or attract lovers, and interact with each other. Biological cold light is the most important way of communication in the world, and in this dark world, the language of light is so important that a flash of light can determine the life and death of an animal. This is perhaps the most common way of communication in the world, with a large number of animals communicating with the sea creatures and the luminescence far more than the animals that communicate in different ways, from crickets that rub sounds to humans who speak. But humans don't fully know all the uses of the luminescence phenomenon of deep-sea animals, which can be used to attract the opposite sex, and bright light can be used to deter or interfere with potential enemies, but there are still many places that are not understood. (To be continued)
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