Sea fleas in black. Sea fleas in an aquarium and pool, how dangerous are they and how to get rid of them? How to get rid of a rash

These are the so-called sand fleas, or amphipods. They belong to the Talitridae family. These fleas are otherwise called beach fleas. Locals They have been known about for a long time; tourists only recently learned about them.

They are very small in size. Their length is only 1-2 mm, but they can jump up to 40 mm. Fleas are dark brown in color and look like shrimp - their body consists of separate segments. They are believed to belong to the same family as cat fleas. Insects do not have wings, but they have long legs.

Insect activity occurs in the evening and morning hours - at dawn or sunset. It is at this time that they bite more often.

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Where do they live?

Accumulations of fleas are often observed near seaweed and along the surf line. A swarm of fleas may make a sound similar to a quiet howl. If in silence you hear a sound that does not resemble the splashing of waves, it is better to leave the beach.

Why are they dangerous?

Both males and females bite humans. Males drink blood, leaving behind only the bite site and itching. A female's bite is fraught with more than just irritation. Females use humans as a source of blood necessary for reproduction.

The sea sand flea burrows into the skin and attaches itself to blood vessel, feeding on the blood she needs to mature her eggs. At the same time, it increases and reaches the size of a pea. As soon as the eggs are ripe, she shoots them out of the wound and dies.

The remains of the female remain in the microscopic wound, which causes suppuration and severe pain. The disease caused by sand fleas in this way is called sarcopsillosis, or tungiasis.

Signs of a bite

The usual ones resemble a mosquito bite - both in the level of pain and in the consequences - itching, redness, and mild pain appear.

If we are talking about a sucking female, then the signs are different:

• swollen red area of ​​skin;
• the presence of a white abscess;
• the black dot in the center is the flea's abdomen;
• strong pain.

Consequences of the meeting

IN advanced cases suppuration will lead to sepsis, blood poisoning and gangrene, which can even result in death. There are known cases of finger amputation after untreated flea bites.

Sea flea bites

A marine flea that lives on beaches, often bites limbs. At the same time, she loves the places of the buttocks, groin area, spaces between the fingers, areas near the nails, ankles.

Prevention of bites

To prevent the bloodthirsty sea flea from reaching its target, you should follow simple safety measures:

• do not walk along the beach at sunrise and sunset and do not touch the algae;
• do not walk barefoot on sand;
• use sun loungers - do not sit or lie on the beach;
• wear socks;
• to be not on wild, but on sanitized cultural beaches;
• Always wash your feet after walking.

Features of treatment

If a flea does bite, you should not treat its bite like a mosquito bite. If you find suspicious abscesses, lumps on the skin, inflammatory heads, especially those accompanied by pain, you must go to the hospital where the flea will be removed. You can't try to pull it out yourself, like encephalitis tick, pouring oil on the flea. The body of a flea is very fragile, it can break, and its particles will remain in the wound, causing more and more suppuration.

For itching, you can use antihistamines and any anesthetic cream. The good old remedies also help a lot - a compress with soda.

It is important not to scratch the bites to avoid infection.

Sand flea under the skin (video)

The term "sea fleas", water fleas, was a strange term for me until this May when I had a terrible experience with them while on vacation in Mexico.

At first, I thought that I had a sudden allergic reaction to sea water. I wonder why these terrible creatures chose me over all the other swimmers?

What is sea lice rash on humans?

These rashes appear when a swimmer, scuba diver or snorkeler comes into contact with and is stung by tiny digitalis jellyfish larvae ( Linuche unguiculata), sea anemone ( Edwardsiella lineata) and other types of marine life.

These miniature sea creatures have several specialized stinging cells on their bodies called nematocysts.

When touched, the tentacles with natatocysts of jellyfish and sea anemones inject toxins in self-defense. Toxins are responsible for the rash.

Of all the sea larvae that can cause sea lice rashes, the most common culprits are foxglove jellyfish larvae. This means that when people complain about sea flea bites, they should really be talking about thimbles.

In water, foxglove jellyfish larvae cannot be seen with the naked eye. They often sneak through swimsuits and diving suits, where they become trapped. When they are near the body, they begin to sting, for the purpose of self-defense.

Although they occur at any time of the year, sea flea stings and the associated itchy rash occur between April and August.

Florida, Gulf of Mexico, Caribbean are the most dangerous areas where lesions are common, and similar problems have been reported in South America(Brazil), Australia, South-East Asia(Thailand, Philippines) and New Zealand.

In Mexico, people visiting Cancun, Cozumel and other popular tourist destinations during the warmer months are at particular risk of developing sea flea rash. I can personally attest to this after my bad experience in Cancun.

It is reported that in last years Cases of sea fleas have become more frequent. This has prompted authorities in several parts of the US (especially Florida), the Caribbean and Mexico to place purple flags along contaminated sea beaches as a warning. warning sign at the peak of the season.

Good news - Sea flea rash is not contagious.

Symptoms

The bite from an adult thimble jellyfish is usually painful, and you will not immediately notice the attack of their larvae. Only after some time will you feel a tingling sensation in areas of the body covered or subject to friction from swimming or diving equipment. For example, the areas of the armpits, groin, chest, internal sides hips, neck.

In addition to itching and blistering, the rash may be accompanied by the following symptoms, especially in more severe cases:

• Fever;
• Chills;
• Nausea;
• Headache;
• Fatigue, especially in children;
• Urethritis (inflammation of the urethra);
• Redness of the eyes.

Symptoms vary from one person to another depending on the body's response to the sting. People who develop the rash earlier are more likely to develop symptoms.

“People with allergic reactions who are immunocompromised are at higher risk of developing severe rashes,” says Mebane, MD, medical director of the Divers Alert Network (DAN).
Sea flea rashes last from a couple of days to a week. In severe cases, it may take several weeks to heal completely.

What does it look like

Sea lice bites cause red, raised areas of skin along with bumps or blisters, as you will see in the following pictures:

How to get rid of a rash quickly - effective remedies

Although sea flea bites are harmless and heal within a week in most cases, the rash and itching are very uncomfortable.

The home remedies for sea rash listed below will help relieve you from the discomfort of itching and other symptoms, speeding up the healing process.

Do not rub or scratch the skin

This is not the way to get rid of a rash, no doubt. Scratching or rubbing the affected area will only make the condition worse.

The urge to scratch itchy areas can be overwhelming, but restrain yourself from doing so. If you use a towel to dry yourself after a shower, gently pat your skin rather than rubbing it across the surface.

Take a shower

Taking a shower will help relieve skin irritation. One mistake people often make is washing while still wearing a soiled swimsuit. This causes the larvae to become trapped in the fabric of your suit and sting.

Animal and vegetable world on the seabed of the reserve is very diverse. Any rocks, stones, sand, silt under water are inhabited by various living creatures. Despite the relatively small area of ​​the marine part of the reserve (809 hectares) on land at the very edge of the water, where waves only periodically wash the shore, dozens of species live in the splash zone. The number of crustaceans - amphipods can number tens of thousands on one square meter. Small amphipods, called sea fleas for their jumping ability, are especially numerous. They accumulate in masses under the seaweed thrown out by the sea, and if disturbed, they quickly scatter under any nearby shelter. Sea fleas are completely harmless to humans, but the seas play a big role in life. By consuming decomposing algae, these crustaceans play the role of orderlies, cleaning the coastal area from excessive pollution. A striking representative of animals that prefer to live on the border between water and land is the marbled crab. Its shell reaches 4.5 cm in width. The crab quickly runs from one stone to another, hides in cracks and tries to hide when a person approaches. These crustaceans, like other crabs, are orderlies, since they eat the decaying remains of animals, thereby providing an invaluable service to the reserve and to humans. The number of crabs and shrimps on Karadag includes 28 species out of 38 known for the entire Black Sea.

On hard soils a community of algae and various animals is formed, which hydrobiologists call fouling. Until recently, the most colorful and widespread animals were mussels - bivalve mollusks, whose almost black shells often covered the surface of stones and rocks in the reserve with a dense brush. In the 80s of the last century, the largest mussels in the Black Sea were found on the Golden Gate rock. Mussel shell valves can reach a length of 10 cm or more. The mussel filters seawater through its gill apparatus, trapping phytoplankton organisms and various small food particles that constitute their main diet. From one square meter of solid substrate, mussels are filtered and purified to 20 cubic meters water per day. These mollusks are the most powerful living filter of the Black Sea.

In addition to mussels and other bivalves, sea water is purified by other organisms - for example, sponges, which resemble lumps in appearance different color. There are 8 known species of them in the reserve. Tunicates, similar to jugs up to 6 cm in size with two holes at the top, also filter water.

Mussels and other bivalves are attacked by the rapana snail. This is the largest gastropod with a beautiful shell in the Black Sea; its shell length can reach 15 cm. It was first discovered in the Black Sea in the 50s of the last century. Rapana is a valuable commercial species and is actively caught by divers along the entire coast of Crimea. Interesting life cycle this snail. In winter, they burrow into the sand, and in the summer, in July - August, they accumulate in groups for reproduction at a depth of several meters and even near the surface on rocks. Rapana is a favorite delicacy for gourmets.

Rapana - an invader in the Black Sea

The largest crab of the Black Sea is the stone crab or erithia. The color of the shell of this crab is bright red. brown tones. The width of its shell reaches 10 cm. The stone crab is an orderly of the sea. By eating various decaying remains, these crabs help maintain the purity of water. In addition to the stone crab, a small crab, the pilumnus, is often found among the mussels. The shell of this crab is painted in a bright crimson color and, despite its small size The pilumnus “pinches” quite noticeably.

Stone crab

Often on stones and cliffs you can see small “flowers” ​​on short thick legs, reminiscent of asters. These are primitive animals - sea anemones. They are relatives of the famous corals, but unlike the latter they do not have a hard exoskeleton. These unusual animals are predators. Many exposed poisonous tentacles catch various small animals who are careless to touch them. Sea anemones are not the only representatives of these animals in the Black Sea. Very similar to sea anemone but smaller in size and more graceful is the small sessile jellyfish - alfalfa. It resembles a tiny glass with fringe around the edges. Lucernaria is very demanding on the purity of water, so its distribution in the Black Sea is limited.

sea ​​anemone

Despite the relatively small area of ​​the marine part of the reserve, it is home to a surprising number of animals and plants. Thus, more than half of the species of polychaete worms of the polychaete class are found in the reserve - 101 species out of 192 for the entire Black Sea! A striking representative of this group is the perinereis worm, reaching a length of 10 cm. Living perinereis is red-brown in color with a metallic sheen. They feed on plant debris, although small crustaceans, a harpacticide, are found in its intestines. The fertility of perinereis is high - more than 400 thousand eggs per 1 female. Worms - polychaetes, oligochaetes, nematodes - are an important link in the food web of the sea, playing a significant role in the fragile balance of living things.

Small organisms, approximately 1 mm to 1 cm long, play a major role in maintaining balance in the reserve. Reaching colossal numbers, they become an important part of the food of many commercial fish species and an important link in the cycle of life. Imagine that on the rocks of Karadag, in an area of ​​1 square meter, you can count up to hundreds of thousands of small crustaceans of only one species. And in terms of the number of species of small animals there are incomparably more than large ones. Some of these tiny creatures are quite interesting in appearance and lifestyle. So, for example, the small crustacean sea goat is so unusual in body shape that sometimes it is difficult to recognize it as an animal and not a plant. The males of these creatures have a poisonous spike on their claw, which they use to kill prey or use to protect the female from a rival. But due to their small size (only up to 12 mm), sea goats are completely harmless to humans.

If we pay attention to the sandy clearing at the bottom, then at first glance it will seem that there are incomparably fewer inhabitants there than on the rocks. Actually this is not true. Inhabitants of loose soils - pebbles, sand, silt, for the most part burrow into the ground or hide between individual stones. After all, if you’re a little lazy, you’ll soon end up with some fish or crab for lunch. A striking representative of such a burrowing fauna is the crayfish - the mole upogebia with a shell length of up to 6 cm. These crayfish burrow into the ground and, swimming with a mask above the bottom, it is possible to see only their burrows. The body shape of the upogebia is unusual and somewhat resembles a praying mantis insect. Crayfish-moles build their holes in such a way that there are two exits and in case of danger they can jump out from the other side. Therefore, it is very difficult to catch them.

Another large representative of sandy-silty soils is the bivalve mollusk anadara, a recent invader in the Black Sea. Anadara, like higher animals, has red blood and is able to withstand very harsh living conditions. Like many large bivalves, the anadara is a commercial target in some countries.

Anadara - an invader in the Black Sea

Especially many different small animals accumulate on the sand if there are accumulations of torn algae, knocked into heaps by waves and currents. Such accumulations attract crustaceans, snails, various worms and fish, which readily feast on numerous prey. On one square meter of sandy bottom, covered with accumulations of torn algae, you can count tens of thousands of different small inhabitants.

Very interesting representative sand fauna is a swimming crab with a shell width of up to 4 cm. Its hind legs are flattened, which allows it to swim quite successfully and spread to other territories. Among the real crabs off the coast of Karadag, you can occasionally find a sea spider - a long-legged long-beaked, or macropodia, which has maximum dimensions up to 31 mm. Representatives of this genus live mainly in warm seas.

Long-legged long-beaked sea spider

On the sandy bottom of Karadag, even bivalves can float slightly above the ground, moving by jumping. This is how the famous scallops behave, popularly called “crown” for their distant resemblance to this object. Scallops are surprisingly varied in color: red, brown, bright yellow with multi-colored patterns. Unfortunately, these bivalves up to 5.5 cm long have become very scarce in the coastal waters of Crimea and offshore Karadag Reserve, for reasons still unclear.

Source : Grintsov V.A. Fauna of the seabed // Karadag Reserve: Popular Science Essays / Ed. A.L. Morozova. - Simferopol: N. Orianda, 2011. - P. 172-177.

Water sports enthusiasts and ordinary tourists quite often have to deal with bites and burns from jellyfish, corals, algae and other inhabitants of the ocean depths. Therefore, you need to be prepared for an unwanted encounter and know how first aid is provided in certain cases of contact with marine inhabitants.

In the first part of our article, based on materials from the Vinsky forum, we will tell you what to do if you have an unpleasant encounter with jellyfish, hedgehogs, mollusks, octopuses and stingrays.

Corals

You can accidentally cut yourself on coral by hitting its petrified exoskeleton. Seemingly harmless wounds often become swollen and inflamed because they usually contain some amount of animal protein.

What to do if you get a cut on coral: wash damaged areas fresh water, lather, and then rinse well again. To eliminate any remaining coral dust, rinse the wound again with a mixture of water and hydrogen peroxide (1 to 1 ratio). Then cover the wound with an ointment containing an antibiotic.

Coral can sting you, then the following symptoms occur: after contact, a burning sensation occurs, in addition, most likely, a raised, itchy rash will appear. Possible swelling of the lymph glands.

What to do if you are stung by coral: Rinse the burn well sea ​​water(because fresh water increases pain). Then rub the burn with vinegar or alcohol to relieve the pain. If necessary, shave the affected area and use tweezers to remove any remaining coral. To reduce itching and burning, you can take an antihistamine or painkillers.

Jellyfish

When a jellyfish is burned, redness and slight swelling of the affected area are observed.

What to do if you are stung by a jellyfish: Rinse the burn with salt soda. Neutralize stings remaining on the skin by generously washing the burn with 5% table vinegar or isopropyl alcohol 40-70%. Remove the remaining tentacles with tweezers. Shave the affected area if necessary and rinse with vinegar again. Apply Hydrocortisone cream. Sometimes burns can be very toxic and even fatal, so watch for symptoms: nausea, lack of response to irritants, swelling of the affected area, difficulty breathing require immediate medical attention from qualified doctors.

Jellyfish cross (gonionema) when encountered, it gives the following symptoms: suffocation occurs, a dry cough appears, pain in the limbs and lower back, numbness of the fingers.

What to do if you have a gonionema burn: Remain calm if there is no doctor nearby and cover the affected area with sand. Ammonia solution (ammonia), isopropyl alcohol or vinegar can neutralize the poison. The acute period usually lasts four to five days, then the discomfort goes away. It is better not to encounter a cross the second time, since subsequent influxes of poison cause more complex consequences and serious complications.

Physalia, or the Portuguese man-of-war is not a jellyfish, but it resembles it in appearance.

This large transparent bubble is up to 25 cm in size, one of its parts is filled with gas, and this keeps it on the surface. The tentacles (up to 30 m in size) of physalia carry a large number of stinging cells, which are dangerous to humans with their poison. Contact with its tentacles results in a severe “burn” and causes excruciating pain. Later, other symptoms of poisoning appear - fever, damage to the nervous and circulatory systems, respiratory functions. A person affected by physalia poison in water can hardly stay on the surface, which can be deadly.

Jellyfish aurelia usually up to 25 cm in diameter, pulsating, transparent, with hair-like tentacles and four kidney-shaped gonads. Aurelia burns cause skin irritation. Exotic and vibrant appearance can encourage vacationers to catch a beautiful “silicone toy” floating in the sea.

The tentacles of Aurelia, 15 m long, can be felt even as you approach this “toy”. At the same time, fragments of tentacles, even washed ashore, remain dangerous even when dry.

Sea wasp jellyfish(or box jellyfish in Australia) - a small transparent jellyfish, considered the most dangerous animal depths of the sea, which has killed more people than the shark. The venom of the sea wasp is similar in composition to the venom of the cobra, but exceeds it in potency. A stung person can die within a few minutes.

The venom of this jellyfish has a nerve-paralytic effect. When affected by poison, unbearable pain appears at the site of the stinging thread burn. After a couple of minutes, the limb may become paralyzed, and the aching pain will spread to the lymph nodes. Painful sensations may appear and fade in paroxysms, and disappear after some time. However, there are frequent fatalities from extensive burns caused by the stinging apparatus of the box jellyfish.

The affected area must be washed with sea water and then watered generously with 5% table vinegar or 40–70% isopropyl alcohol. Then use tweezers to remove the remaining tentacles. The need for cardiac massage and artificial respiration is very likely. The victim must be sent to the hospital immediately.

Sponges

Due to their vulnerability, sponges have developed very effective ways chemical protection, so it is not recommended to touch them at all. You should especially avoid contact with brightly colored sponges - yellow, orange and red. The skeletal needles of sponges can even pierce the neoprene rubber of gloves. The toxin produced by sponges causes severe skin irritation and dermatitis.

What to do if you are stung by a sponge: the affected area of ​​skin must be washed with sea water and then treated with isopropyl alcohol or table vinegar. An allergic reaction to a burn can be quite severe, and the help of a doctor is necessary.

Sea urchins

The quills of these echinoderms are poisonous and cause painful stings (often also infection), and by remaining in the wound, the hedgehog's quills cause further pain. A large number of In rare cases, injections can cause paralysis and even death. A symptom such as difficulty breathing requires immediate medical attention.

What to do if you get pricked by a sea urchin: Carefully leave the water, being careful not to break off the tips of the needles sticking out of the skin. On the shore you will have to endure as best you can to wait until the body dries out. Never pull out needles with your teeth, nails, tweezers or other hard objects!

Ask someone to give you a paper napkin or paper handkerchief and carefully use the napkin to pick up a separate needle and pull it out, trying not to break it off. Then a local antibiotic can be applied. It's also a good idea to get a tetanus shot.

If the hedgehog's needles have broken off at the root and it is almost impossible to pull them out, do not panic - disinfect the affected area with alcohol. The next day the pain usually subsides and then goes away altogether. Limestone needles will eventually dissolve in your blood and leave the body without a trace.

Often with injections sea ​​urchins The wound becomes infected and a long-term inflammatory process develops. The reasons for this are the needle particles remaining in the body, which could not be completely removed.

To avoid getting pricked, it is not recommended to touch sea urchins with long needle-like spines. It is worth remembering that even leather and fabric gloves, boots, and fins are not 100% protection! Therefore, when moving through shallow water, you need to exercise extreme caution so as not to accidentally step on poisonous echinoderms.

To neutralize the poison, you can also soak the damaged part in very hot water for 30-90 minutes or apply a pressure bandage.

When encountering a black sea urchin with long spines, black dots may be visible on the skin - this is a pigment, it is harmless, but can complicate the process of finding stuck spines.

One of the most poisonous sea urchins is the red trypneusthes. Under no circumstances should you touch it! This hedgehog loves to sit between the stones at low tide. It also comes in purple and white.

Bristle worm

When coming into contact with a bristle worm, symptoms such as swelling, burning and pain are observed.

What to do if you are bitten by a bristle worm: Rinse the wound with vinegar or alcohol to neutralize any remaining poison and relieve pain; sticky tape or strips of tape will help get rid of stubble. Hydrocortisone cream will help relieve inflammation; you should also take painkillers.

Stingrays

The smaller the slope, the more problems he can deliver to a person. Of the stingrays, the most dangerous are stingrays (with a poisonous spike on their back) and electric stingrays. An encounter with these creatures can happen even close to the shore with a sandy bottom.

Electric Stingray It has a round and fleshy body, often brightly colored, and resembles a very thick pancake in appearance. The narrow tail is sharply separated from the body of the stingray; there is a caudal fin. Gill slits are located on the belly. Their electrical organs are located on the sides of the body between the pectoral fins and the head, and they consist of modified muscle tissue. The voltage recorded during the discharge of an electrical organ various types stingrays is very different and ranges from 8V to 220V. Electric ramps lead a sedentary lifestyle on the bottom, mainly in coastal marine areas. The electric shock of a stingray is very unpleasant, in some cases causing paralytic shock.

Stingray stingray- round, flat in shape, with a long thin tail, about one or one and a half meters long, with poisonous spines. This stingray swims very fast. You need to beware of the tail; its spines are very difficult to remove from the body, as the spines often break when pulled out.

Symptoms of the injection are bleeding and severe pain. The wound may change color and become swollen, and there may be swollen lymph nodes or other body reactions. The stingray itself is sandy yellow. Keep in mind that stingrays can also hide under the sand.

What to do if you are struck by a stingray: First, wash the wound with sea water. Then immerse the injured area in hot water to relieve pain. Use tweezers to remove any remaining sting. Wash the wound again with soap. Stop the bleeding and bandage the wound tightly. Usually the affected area becomes inflamed and swollen, so medical intervention is necessary.

Shellfish

A great danger, especially for a diver, is the tridacna - the world's largest bivalve mollusk, whose length reaches one and a half meters and weighs 250-300 kilograms. If a person’s limb falls into a gap between slightly open doors, it can be clamped by the slammed doors like a vice. There are cases when sponge catchers even cut off a limb to save their lives. If there are tridacna in the ground, great care should be taken. If a limb is pinched, it is necessary to cut the valve closing muscles with a knife or a sharp object.

Poisonous are cone mollusks from the class of gastropods, which have a bright, conical shell. These mollusks inflict a sting with a needle-sharp thorn, which is hidden in the narrow proboscis of the shell. Inside the thorn there is a duct of the poisonous gland, through which strong poison is injected into the wound. At the moment of the injection you feel a sharp pain. Injury from some types of cones can be fatal. Due to nerve poison, paralysis of respiratory and cardiac activity occurs.

Cones are poisonous fish-eating shellfish, but they can actually kill humans. They become very active when touched in their habitat. If you take the shell in your hands, it instantly extends its hard proboscis, the radula, and thrusts its spike into the body.

The injection is accompanied by acute pain leading to loss of consciousness, as well as numbness of the affected area and other parts of the body. Then paralysis may begin of cardio-vascular system and respiratory organs. According to statistics, one out of three cases of being pricked by a cone snail's thorn ends in death. All these cases took place due to the fault of man: attracted by the beauty of the mollusk, he took it in his hands and forced the cone to defend itself.

If the cone is affected by poison you need to isolate the injection site with two tourniquets on both sides and urgently take the victim to the hospital.

It is better to consult a doctor immediately after a bite, he will prescribe a pain reliever and give the necessary vaccinations. You may also need additional monitoring.

Remember that cones are very beautiful, so children often suffer from them! They can lie in the sand, while retracting deeply into their shell. The needle shoots out from the tip of the throat, very quickly and unexpectedly.

Octopuses

Large octopuses are dangerous because they can detain a diver at depth. On the 8 tentacles of an octopus there are about 2 thousand suckers, each with a holding force of about 100 gf, that is, the total holding force of an adult octopus can exceed 150 kgf.

An octopus bite also poses a real danger. The secretion of the octopus' poisonous salivary glands can get into the wound. In this case, acute pain and itching is felt in the area of ​​the bite. An inflammatory reaction and heavy bleeding from the wound occur due to slow blood clotting. Usually after 2-3 days recovery occurs. At the same time, there are cases severe poisoning when symptoms of central damage appear nervous system. If you are bitten by an octopus, you need to apply a tourniquet. Prolonged artificial respiration may be required. It is necessary to urgently take the Victim to the hospital.

Sea fleas

Vacationers who like to swim far into the sea often meet these inhabitants of the underwater world. Suddenly, absolutely clean water, 30-50 meters from the shore, the swimmer’s body begins to feel a burning tingling sensation, as if someone is pricking him with thin hot needles. If this happens, do not panic and do not try to fight it off with your hands, as you have fallen into a school of small transparent crustaceans - “sea fleas”. The best thing to do is to swim quickly to the shore. Usually, “sea flea” bites end without any consequences, and only people with delicate skin may develop “hives” on the body.