This magnificent natural phenomenon is called "bioluminescence". It exists in many places of the world near the sea or ocean, and manifests itself in different ways. Sometimes it seems that small stars twinkle under the water, at other times the special northern lights spread over the surface of the water delight. This spectacle is best enjoyed in March, August and September.
A bit of history
For centuries, the glow of the seas and oceans has remained a mystery. According to one version, scientists explained it by the presence of phosphorus in water and electrical discharges that occur during the friction of salt and water molecules. According to another version, thus, the ocean at night gives the Sun the energy that it has accumulated during the day. The real solution was found in 1753 - then the naturalist Becker examined drops of sea water through a magnifying glass. His magnifying glass spotted tiny, single-celled organisms, the size of which was about 2 mm in diameter. Interestingly, they reacted to any mechanical or chemical irritation with flashes of light. These "water fireflies" were called nightlights. Now the fact that it is phytoplankton that is responsible for the “illumination” of the night sea or ocean during its mass reproduction is already undeniable.
The sparkling squid Watasenia scintillans lives here. At the beginning of spring, they have an annual breeding season, and then thousands of fry rise to the water surface in search of a partner (or better, several). Bright blue light helps squids to attract a mate for mating, and gives tourists an unforgettable and truly fabulous spectacle.
Amazing glows were also recorded on the Vaadhoo Islands. Thanks to bioluminescent dinoflagellates, it seems that the local coast is completely drowned in the starry sky.
In San Diego, "water glows" don't happen every year. To be honest, scientists still do not know how to predict when they will occur. But if this event does occur, as if by a wave of a magic wand, some invisible wizard paints the sea surface with blue phosphorus paints. If you are lucky enough to visit the local beaches, be sure to visit them at night. Who knows, what if you are the lucky one to plunge into a fairy tale for a moment?
Once upon a time, strange "blue tears" were seen on the local waters, which caused a great commotion around Matsu. Scientists from the National Taiwan Ocean University conducted a whole four months of research, taking daily water samples. As a result, they found the culprit of the mysterious glow - it was the aforementioned "night light". Research is still ongoing to find other organisms that make their "shimmering contribution" to the blue waters of the ocean.
The warm summer months in Navarra Beach are especially popular. Still would! After all, tourists are offered a very unconventional entertainment - a night adventure in kayaks, and we think you have already guessed why it is special?
Hurry to see! The Sea is now shining in Crimea!! A spectacle of rare beauty!
“... The whole sea is on fire. On the crests of small, slightly splashing waves, blue gems. In those places where the oars touch the water, deep brilliant stripes light up with a magical brilliance. I touch the water with my hand, and when I take it back out, a handful of luminous diamonds fall down, and gentle, bluish, phosphorescent lights burn on my fingers for a long time. Tonight is one of those magical nights that fishermen talk about: "The sea is on fire!"»
(A.I. Kuprin.)
To all those who like night swimming in the sea know what the classic says so poetically and subtly. This is about night glow of the sea.
This magic of nature usually takes place from July to the end of September, during the summer-autumn development of plankton.
In our latitudes, this phenomenon can be observed in the Black and Okhotsk Seas.
Those who were lucky enough to accidentally and unexpectedly witness this miracle perceive it as the magic of nature. Those who have heard or read about it, take note that this incredible phenomenon is necessary in without fail see with your own eyes.
In August, the Sea of \u200b\u200bAzov glows very brightly.
I think those who rested in the second half of summer in our tent camp "Kimmeria" in the Sea of \u200b\u200bAzov, they will never forget the night luminous action they saw.
Yes, indeed an extraordinary sight, even for me, who often visits the sea.
I like to swim at dusk and at night, enjoying the warm sea, the stars in the sky and the blessed light of sea water, from which you come to blissful delight!
You stand on the shore, shrouded in a mysterious world, surrounded by the caress and warmth of the bay, the smell of sea grasses and shimmering darkness.
The stars are burning above your head, the lights of distant shores are shining, then you draw water from the sea - and the sea sparkles in your hands ...
I remember how even inveterate pragmatists, entering the night sea and watching this magical action, rejoiced like children, not hiding their surprise and delight from what they saw.
And the night storm! You stand on the top and see below you how the seething abyss is silvering and glowing ... it seems that the starry sky and the blue sea have changed places.
Paustovsky very accurately noted:
“... the sea turned into an unfamiliar starry sky thrown at our feet. Myriads of stars, hundreds of milky ways floated under the water. They then sank, dying to the very bottom, then flared up, floating to the surface of the water.
sea glow have been observed for a long time and the explanation for this phenomenon was given far from immediately.
A description has been preserved of the lights in the sea, seen by H. Columbus on the night when the ship "Santa Maria" approached the islands of the "West Indies". The ship at the time was near Watling Island, the site of Columbus's first landing.
Later, Charles Darwin in his “Journey on the Beagle” described not only the glow of the sea, but also the glow of a hydroid, one of the lower invertebrates: “I kept a large bunch of these zoophytes in a vessel with salt water ... When I rubbed in the dark some part of the branch, then the whole animal began to strongly phosphoresce with green light; I don't think I've ever seen anything more beautiful than this. The most remarkable thing was that the sparks of light rose up the branches, from their base to the ends "...
The paths taken by scientists before they were able to correctly explain the essence of sea glow, which for centuries remained one of the mysterious phenomena of the universe. Various assumptions have been made.
It was believed that this is due to the phosphorus content in water or electrical charges that arise due to the friction of salt and water molecules. Others believed that the glow arises as a result of the friction of sea waves against the atmosphere or some solid body (boat, rock, coastal pebbles). It was even assumed that at night the sea returns the energy of the Sun accumulated during the day.
B. Franklin came closest to the truth.
He believed that it was an electrical phenomenon.
And only in 1753, they found an explanation for this phenomenon - the naturalist Becker saw under a magnifying glass tiny unicellular organisms, two millimeters in size, which responded to any irritation with a glow.
The phenomenon itself was named "bioluminescence", what in literally The word means "weak living glow", or "cold" light, because it does not appear from a heated source, but as a result of a chemical reaction with oxygen.
This is the natural glow of a large mass of marine organisms that have luminescent (luminous) cells.
Glowing in the sea many living organisms - from tiny bacteria not visible to the eye to huge fish.
But the principle of glow is similar for everyone, it is akin to the glow of nocturnal firefly beetles, which we are surprised and admire on warm summer nights.
The substance - luciferin (light carrier - Greek) is oxidized by oxygen under the action of the enzyme luciferase and quanta of green light break out.
Why do living organisms glow? The reasons are different: scaring away enemies or attracting a victim ... It happens that during the mating season, lovers “shine with happiness” ... Yes, yes .. literally glow with happiness -)).
In the Black Sea you can see glow of ctenophores, tiny plankton crustaceans and planktonic algae.
The largest, of course, are transparent ctenophores, which are similar in shape to jellyfish, although they are not at all a related species.
During the day, ctenophores sparkle like an underwater rainbow, and at night they glow.
If swimming summer night at sea, you will see how suddenly the green magic lamp flashes: it was you who touched the ctenophore.
And if you scoop sea water into your palms and throw it up - green sparks will fly into the air - along with drops, a lot of tiny crustaceans went into the air.
This is probably the only and wonderful way to see life in every drop of sea water, without a microscope.
Luminous plankters create a completely different effect: each of them is the smallest crumb, but in their multimillion-dollar mass they seem to envelop with light large objects and spaces. And then you can see a striking picture: a luminous swimmer or a boat that glows and splashes splashes of diamond light with its oars.
And if you are lucky, you can see the games of dolphins blazing with green fire!
The spectacle of the glowing sea- one of the most fascinating in nature, which you can admire endlessly ...
The most numerous of the luminous plankters in the Black Sea - planktonic alga noctiluca, or as it is popularly called -.
This seaweed is a predator. She does not have chlorophyll, and she looks like a miniature transparent apple with a tail-flagellum. For planktonic algae, it is quite large - about 1 mm in diameter.
Noktilyuk- not the only representative of bioluminescents in the Black Sea, some other small algae and bacteria also glow.
Some jellyfish sometimes burn with white light. 
The strange animal “sea feather”, similar to a coral bush, burns with the same light.
If it is taken out of the water at night, then many wandering points of fire begin to run up and down along the branched parts of the animal.
Some shrimp emit a bright yellow light, and the Black Sea folada shell, drilling through the rocks, burns with blue fire.
If you walk along the edge of the surf, you can find small, constantly luminous dots on the sand - these are amphipods, or sea fleas - but only already inanimate, they no longer jump, like those that we chase after the seagulls during the day.
These crustaceans have already begun to be eaten and decomposed, bacteria that glow.
Not only planktonic microorganisms glow, but also many bottom ones: if you dive onto a rocky bottom and rub any smooth surface, it will glow; lift the stone from the bottom, rub it - it will glow.
If it was calm over the sandy bottom for a long time - there were no waves and no people were swimming, a film of microlife forms on the surface of loose soil, which glows.
Passing along such a bottom, emerald traces will remain behind you.
However, in most cases, the sea glows thanks to nightlight.
When it appears at the surface of the sea, everything glows: bursts of waves, oars, hands dipped into the water, fishing lines and nets, and even submarines and ship bottoms, fish and bathing people become emerald and leave behind a clearly visible sparkling light.
There are real legends about the nightlight ..
.... Taurica. A mysterious and tempting country that so attracts restless Hellenes.
Yes, that's bad luck: the inhabitants of Taurica are proud and freedom-loving, they want to reign supreme on their paradise land.
Neither flattery nor hard cash can approach them.
And then the Greeks decide to act by force.
They select the bravest and most skillful warriors in battle, equip the fastest ships and choose the darkest August night...
And here it is - a strange and such an attractive peninsula!
The black outlines of its steep banks are barely visible against the dark sky.
But this is enough to quietly and smoothly sneak up from the sea to an unsuspecting enemy.
The Hellenes are very careful, because patrols are probably posted on the shore.
And because the oars silently go into the water, none of the soldiers utters a word.
But what is it?!
The sea suddenly flares up with a cold green-blue flame, as if some omnipotent one in an instant lit the sea surface in front of the longed-for Tauris.
“O great Zeus,” cried the Greeks,
Why are you punishing us so cruelly?
And the highlanders have already noticed the approaching enemies and raised the alarm. A lot of lights swept up on the shore. What was left for the Hellenes to do?
Just admire for a while magical mystery of the luminous sea and ... with nothing to turn the ships to the house ...
This is how the tiny one once saved the people of Taurica from great bloodshed and inevitable enslavement.
If you are lucky relax in the Crimea on the Black Sea or the Sea of \u200b\u200bAzov in August-September(the most "favorite" time of noctiluca in the sense of glow), whether it's an independent vacation or Dory Wanderer multi-day tours, do not miss the opportunity to swim or at least take a walk near the sea on dark nights.
Then you will definitely witness a fantastic extravaganza on the water.
Or maybe its members...
With southern greetings from the sea, South
Glowing plankton is an amazing sight. This microscopic organism is able to turn the whole sea into a shining starry sky, moving the observer to fantasy world magic.
Plankton
Plankton is a generic name for a variety of heterogeneous organisms that mainly live in well-lit water layers. They are not able to resist the force of the current, so often their groups are carried to the shores.
Any (including luminous) plankton is food for the other, larger inhabitants of the reservoir. It is a mass of algae and animals that are very small in size, with the exception of jellyfish and ctenophores. Many of them move independently, so during periods of calm, plankton can move away from the coast and ply along the reservoir.
As mentioned above, the upper layers of the sea or ocean are the richest in plankton, but some species (for example, bacteria and zooplankton) inhabit the water column to the maximum possible depths for life.
What types of plankton glow?
Not all species have the ability to bioluminescence. In particular, large jellyfish and diatoms are deprived of it.
Luminous plankton is mainly represented by unicellular plants - dinoflagellates. By the end of summer, their numbers peak in warm weather, so during this period one can observe especially intense illumination off the coast.
If the water shines with separate green flashes, then you can be sure that these are planktonic crustaceans. In addition to them, ctenophores are prone to bioluminescence. Their light is dimmer and spreads through the body in azure tints when it collides with an obstacle.
Sometimes a rather rare phenomenon happens when the luminous plankton in the Black Sea shines for a long time without interruption. At such moments, the blooming of dinophytic algae occurs, and the density of their cells per liter of liquid is so great that individual flashes merge into a bright and constant illumination of the surface.
Why do plankton glow in the sea?
Plankton emit light through a chemical process called bioluminescence. A thorough study revealed that this is nothing more than a response to irritation.
Sometimes it may seem that the action occurs spontaneously, but this is not true. Even the movement of water itself serves as an irritant, the force of friction has a mechanical effect on the animal. It causes an electrical impulse rushing towards the cell, as a result of which the vacuole filled with elementary particles generates energy, followed by a chemical reaction that results in the surface glow of the body. With additional exposure, bioluminescence is enhanced.
Speaking more plain language, we can say that the luminous plankton will shine even brighter when it collides with some kind of obstacle or other irritant. For example, if one puts one's hand into the very cluster of organisms or throws a small stone at its center, the result will be a very bright flash, capable of momentarily blinding the observer.
In general, this is a very beautiful sight, because when objects fall into water filled with plankton, blue or green neon circles diverge from the point of contact. Watching this effect relaxes well, but you should not abuse throws into the water.
Where to see
Luminous plankton is found in the Maldives and in the Crimea (Black Sea). It can also be seen in Thailand, but, judging by the reviews, infrequently. Many tourists complained that for the sake of this spectacle they even visited paid beaches, but often left with nothing.
In the presence of scuba diving equipment, it is very cool to watch plankton at depth. It is comparable to being under a starfall and literally takes your breath away. Nevertheless, it is worth doing this only with a small accumulation of organisms. This is due to the release of poisonous toxins by some species of plankton that are dangerous to human health.
Therefore, it is still safer to observe the glow from the shore. It is especially not recommended to let children into the water at such moments, because the dose of toxins, which will be trifling for adults, can cause intoxication in a growing organism.
At night, there are both phyto- and zooplankton near our coast - everything is mixed in shallow water. And most plankters are able to glow in the dark. This is one of the most joyful - for us - their properties. Chemically, the glow reaction of marine organisms is exactly the same as that of firefly beetles, which we admire on warm summer nights on the coast. Substance - luciferin (light carrier - Greek) is oxidized by oxygen under the action of an enzyme luciferase . Most chemical reactions release heat, but this one releases one quantum of green light.
From July to the end of September. But the most best time- from the beginning of August to the beginning of September - the first weeks of the summer-autumn development of plankton.
Already approaching the dark water, we see that a weak surf shakes pieces of greenish light on the sand - feel them with your hands - they are slippery, they melt on your fingers. It was the waves that washed the ctenophores to the shore, they have already been smashed against the sand, but they continue to glow. Shake them off your hands - and the light will remain on the palms - even smaller pieces of the delicate bodies of sea creatures stuck, remained on your skin. If we walk along the edge of the surf, we will find small, constantly luminous points on the sand - we will pick them up and try to examine them. These are amphipods, sea fleas - but already dead, they do not jump, like those that we chased during the day. These crustaceans have already begun to be eaten, decomposed, by bacteria that always glow - rotten ones glow in the same way. Why do planktonic organisms glow? Let's wait for the night and answer this question ourselves. The darker the night, the better - the flashes of living light in the sea will become more noticeable. And, of course, the sea must be calm - otherwise we will not see anything. In general, the night should be quiet, dark and warm. There are many such on our shore - from the beginning and in the night forest. Do not be afraid - admire, this is also life. Amphipods have a lot of microscopic spines on their shells - we have already seen them - these spines will allow you to attach a glowing badge to your shirt - just press the crustacean to the fabric.
We will enter the dark clear water from the familiar beach - by touch. On a summer night, the sea is warmer than the air above it, you can swim without feeling the water - they usually talk about this - like fresh milk! - but night is night - and, perhaps, it is worth once again reminding you of caution - you should not swim where you cannot get to the bottom.
Let's slowly, without splashing, step from the shore and look at our feet. And the legs are glowing! These are tireless plankters - mobile algae, crustaceans - collide with our skin and flash with emerald light, there are so many of them that the bodies of people moving in the water become emerald. When there is really a lot of plankton, one can observe an amazing sight - a floating luminous person. He dives - and shines brightly under water, and leaves a sparkling trail behind him.
Rarely, but - there is such luck - you manage to see the games of dolphins blazing with green fire! And if you go out to sea at such a time in a boat, the oars seem to be burning - and with each stroke they break off and remain behind, circling and wriggling, tongues of green flame.
Such an even, strong glow, in which no individual flashes are visible, is caused by planktonic dinoflagellates - they are most abundant in warm water. Diatoms cannot glow. Any movement we make in the water causes radiance and flashes. Radiance is a lot of small flashes of microalgae, merging into a single glow - there are so many of them. And separate bright green lights are flashes of irritated planktonic crustaceans. Sprinkle water - green sparks will fly into the air - it is you, along with drops, that threw many tiny crustaceans into the air. Here is probably the only - and wonderful - way to see, without a microscope, life - in every drop of sea water.
If something bright and big caught fire next to you in the water, it is the comb jelly - the largest luminous animal of the Black Sea. You can try to scoop it up with a boat of your palms - consider its radiance.
Not only planktonic microorganisms glow, but also many bottom ones: try to dive onto a rocky bottom and rub any smooth surface - it will glow; pick up a stone from the bottom, rub it - it will still glow when you emerge and lift it above the water. If there were no waves above the sandy bottom for a long time and people didn’t swim, even on the surface of loose soil a film of microlife is formed that can glow - then, walking along such a bottom, you will leave emerald traces.
We have already understood that plankters do not glow all the time, but when irritated - hitting an obstacle, strong movement of water. Such signals for a paddlefish or dinophyte algae are a sign of a possible approach of a predator, or even a collision with it. The flash should scare off the aggressor. How could such a small spark scare anyone? But compare the sizes! People are usually frightened by an unexpectedly lit ctenophore - and yet it is - just something - the size of an apple. For a small plank-eating fish - sprat, atherinka - a flash of green fire from the crustacean oytona can be a reason to flee. And an outbreak of dinophyte algae, in turn, can frighten off a copepod cancer or a worm larva. So the glow of plankton, which delights us so much on summer nights, is an active defense of weak plankters from voracious plankton feeders.
There are rare cases of a constant glow of planktonic algae - during a powerful flowering of noctiluca, or other dinophyte algae. The density of algae during such a powerful development of phytoplankton - millions of cells in a liter of water - is such that individual collisions, individual flashes of light, simply merge into a constant glow.
Some marine organisms have light signals that are not intended to scare away, but, on the contrary, to attract someone - to eat this someone, or, if it is an individual of the opposite sex, to mate with it.
Deep-sea anglerfish hang luminous organs in front of their open mouth, and the prey fish, swimming towards the light, ends up in the anglerfish's teeth. In the Black Sea, from the anglerfish family, one is occasionally found - the European anglerfish, or monkfish - a fish of a completely unusual type, but this species, although it has a fishing rod with a bait suspended over a wide mouth, does not glow. It rarely appears near our coast - sometimes it gets into trawl nets.
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The fact that there are no luminous anglerfish in the Black Sea is natural. For a successful hunt, they need complete darkness - these are the fish of the depths. In our sea, deeper than 150-200 meters, there is no oxygen necessary for breathing in the water, but there is poisonous hydrogen sulfide; fish can't live there.
Remarkable light appears in the sea in those places and at the time when some species of planktonic polychaete worms mate. Our Platinereis and Glycers, which we have just reviewed, unfortunately do not glow. But the usual Atlantic Nereis once a year arranges a fantastic light show in the waters of the Gulf Stream. On the night of the first summer new moon, the entire population of the island of Bermuda gathers on the walkways across the narrow straits that divide this island, located on the very rapids of the Gulf Stream. The only sea worm mating night of the year, a local Bermuda holiday - and I was lucky enough to be there at that time. Standing on a bridge over one of the island channels and peering into the black water, you finally notice the first, glowing with a bright, white-green light, a wriggling worm the length of a finger, the thickness of a match. It is not for nothing that the Gulf Stream was called a river in the ocean - the speed of the current is 4 km / h, we walk with that speed. And now the current brings new nereises, in half an hour - the water turns into a boiling, radiant, white-green stream - the worms swim, spewing luminous clouds of caviar and seed that mix before our eyes, these are fountains of light, this is - literally - a celebration of the birth of a new life accompanied by fireworks! You go down to the shore, catch a Nereis, and your palm is covered with a luminous liquid...
The glow of Nereis, in addition to attracting mating partners, also plays a deterrent role: in the sea there are many invertebrates and fish that can eat both worms and their eggs, but the bright light of the mass of Nereis, their eggs and seeds, will undoubtedly scare them away.
This story, of course, is not Black Sea, it is - just - about one of the wonders of marine life, most of which are waiting for you ahead. And the Black Sea is a very good sea for the first steps on this path.
Incidentally, the story of the Gulf Stream glowing from worms ended in general laughter from all the biologists who were then working at the Bermuda Biological Station. That evening, the whole company from the biological station went to look at the mating of Nereis. But one Japanese did not go - he said that he had already seen a similar phenomenon. We returned late at night, joyful, animated, found and pushed a sleepy Japanese biologist aside, began to tell him ... He stopped us, and silently led us along - it turned out that we were going to the toilet. Fresh water in Bermuda is very scarce, and to flush toilets, water is pumped into tanks directly from the sea. The Japanese put out the light in the toilet, pressed the drain... Streams of luminous, sparkling water poured into the toilet, illuminating the cramped room.
July 24, 2018A lot has been written about the rest on the Sea of Azov, its advantages and disadvantages are described in detail ...
However, there is surprisingly little on the net about this sea of information, except for that addressed to specialists. And this despite the fact that the Sea of \u200b\u200bAzov is in many ways unusual, scientists believe that it was formed as a result of a global natural disaster around 5600 BC. e., that is, already in historical times. In this article, we have tried to eliminate some gaps in the knowledge of tourists who are happy to relax in the resorts of the warm and sunny Azov coast, and here we present little-known information about the Sea of Azov.
Shallow water and other "records"
The fact that the Sea of \u200b\u200bAzov is the shallowest in the world is known, perhaps, to everyone. The greatest depth is 13.7 meters, by sea standards - a trifle. But few people know about another "world record" belonging to him. The Sea of Azov among the inland seas of the planet is the most distant from the World Ocean. Including from the Atlantic Ocean, to the basin of which it belongs. Another all-Russian "record" is the smallest sea of all washing the shores of our country.
Heat and ice
Temperature in upper layers water in the resort areas of the coast in summer sometimes rises to 30 degrees Celsius. And in winter, bays and bays in the same zones are often covered with ice. There are cases in history when the water area Sea of Azov almost completely covered in ice.
To whom is carp, to whom is a shark ...
Many large and small rivers flow into the Sea of \u200b\u200bAzov, bringing annually millions of cubic meters of fresh water. And the narrow Kerch Strait cannot provide it with real, “sea” salinity, it is three times lower here than on average in the World Ocean. Low salinity leads to natural paradoxes. So, in the Sea of \u200b\u200bAzov there are river fish, such as pike perch, crucian carp, pike.
And they coexist here with stingrays, sharks and even dolphins! True, the sharks here are small, quite safe and are extremely rare off the coast.
And the waves are quiet...
The Sea of \u200b\u200bAzov can also be called the most "quiet" in the world. The highest wave ever seen here did not exceed 4 meters. On average, the height of storm waves in the seas and oceans is 7-8 meters, waves (tsunami) with a height of more than 30 meters are known, but such cataclysms have not been noted in the Sea of Azov.
The Kerch Strait is expanding
In 1068, Gleb Svyatoslavovich, the Russian prince who ruled at that time Tmutarakan (the farthest Russian principality, at the mouth of the Kuban), measured the distance between the extreme points of the Taman and Kerch peninsulas on ice. This was the first known attempt to measure the width of the Kerch Strait. The measurement showed a result of approximately 20 kilometers. Today, after 950 years, this distance has increased by three kilometers. Either the prince was mistaken, or the strait has expanded over the years - there is no consensus among scientists.
It also glows!
If you are lucky and you go to rest on the Sea of Azov in August, you will be able to witness an amazing spectacle - the night glow of the sea. The common belief that it is algae that glows is erroneous. There is even less reason to speculate about some connection between this glow and the level of radiation. Scientists call this natural phenomenon "bioluminescence", its cause is the accumulation of sea water near the surface. a large number living microorganisms.
Clear, azure...
Another erroneous opinion about the Sea of \u200b\u200bAzov is based on stories about some unprecedented turbidity of its water. In fact, the Azov water is very clean, the sand that covers the seabed and is quite close to the sea surface is an excellent natural filter. Waves and wind can sometimes raise sand from the bottom, and the water can become a little cloudy, but the wind subsides - and the water again becomes transparent, with a beautiful azure hue.
Beyond the four seas
As mentioned above, the Sea of \u200b\u200bAzov is the most distant from the oceans. It is separated from the "native" Atlantic Ocean by as many as four "intermediate" seas - the Black, Marmara, Aegean, and Mediterranean. Therefore, and also because of the narrowness of the Kerch Strait, there are never ebb or flow here.
deep and expensive
At the bottom of the Sea of Azov, more precisely, in the bowels of the earth under its water area, and in coastal areas, there are large deposits of oil and gas. Fortunately for vacationers and fishermen, they are not exploited, the extraction process is considered too time-consuming and expensive.
How to see…
The Sea of \u200b\u200bAzov, by European standards, is not so small. In its waters, two European states could freely settle down - the Grand Duchy of Luxembourg and the Kingdom of the Netherlands. And the total length of the sea coastline is 2688 kilometers.