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The sea jellyfish, which is called a wasp, belongs to the category of box jellyfish, a type of cnidarians. She is a representative of the exceptional animals of the marine world and is able to live only in the salt water of the seas and oceans.

Invisible danger

The sea wasp jellyfish is considered the most poisonous jellyfish in the world. The toxin that is released from its tentacles depresses the nervous system, causing severe burns and unbearable pain. The result is a heart attack that can lead to cardiac arrest. Timely medical assistance in some cases can save a person’s life. However, there are known cases of death within a very short period of time after an encounter with a poisonous monster. Even a dead sea wasp (photo below) is a source of increased danger. The poison-toxin disintegrates only a week after the death of the jellyfish, so it is strictly forbidden to touch it.

Unfortunately, jellyfish of this species are also found in places beach resorts and diving sites. Another danger of meeting a sea wasp is that it is almost invisible. Therefore, precautions should not be neglected.

Habitat

The jellyfish is found in the Indo-Western Pacific Ocean and in South-East Asia. The sea wasp is most often found off the coast of northern Australia, where there is plenty of coral and shallow sea depth during the summer months from November to March. Jellyfish inhabit coastal areas at a respectful distance from the coast, but when the sea is very rough they can be washed ashore.

Appearance

The sea wasp is the most major representative of his class. The body of the jellyfish is a transparent dome, consisting of 95% water. Its shape is similar to a rounded cube, hence the name box jellyfish. The size of the dome is 20-45 cm, in size it can be compared with a basketball ball. It has a pale blue color and is completely invisible in the water.

The animal has 24 eyes, which are located in three pairs in each corner of the dome. Two pairs of eyes serve to receive images, and one only reacts to light. Scientists cannot explain the presence of so many eyes in a jellyfish, because the information received from what it sees has nowhere to be transmitted; it does not have a brain.

In addition to the organs of vision, there are 60 tentacles - four bundles of 15 pieces each. The probes, 15 cm long and 5 mm thick, stretch up to three meters when hunting for prey. Each tentacle is covered with stinging cells containing deadly poison.

The sea wasp does not have a skeleton; it is replaced by two nervous systems, one of which receives and processes information received from the organs of vision, and the other controls the movement of muscles along the border of the dome, which function simultaneously and harmoniously.

Nutrition

Sea wasps feed in coastal waters on small fish and various bottom organisms, but their most favorite delicacy is shrimp. When going out to fish, they extend their tentacles and freeze in place. The jellyfish encloses the stalked victim in probes, pierces the skin, injects poison, kills and swallows. In appearance, its bite resembles a wasp, only the venom is much more toxic, incomparable even to the venom of a snake.

Reproduction

The sea wasp gives birth only once in its entire life, and then dies. Box jellyfish live for about 7 months and continue to grow throughout this period.

Sea wasps reproduce offspring in the same way as other individuals belonging to this species. They reproduce in summer period, gathering in large flocks and swimming closer to the shores. During this period of time, Australia is trying to close all beaches.

The male ejects a dose of sperm into the water while near the swimming female. The latter swallows it, fertilization occurs. Larvae develop inside the female, which after some time are released into the water and settle on the surface of the seabed. They stick to stones, shells, and driftwood, forming polyps.

As a result of budding, small jellyfish grow from polyps, which break off and begin independent life. They immediately navigate the sea and feed on plankton on their own.

What do Australians call a sea wasp?

Due to its transparency, this small sea animal is almost invisible in the water. It is an active predator and poses a great danger to animals and humans. This animal swims well and maneuvers well among algae and corals, moving at speeds of up to six meters per minute. During the day it is most often at the bottom, and with the onset of evening it floats to the upper layers of water. The speed at which a jellyfish attacks its prey is very high.

And the poison contained in the tentacles is so poisonous that when stung, any creature instantly dies. Moreover, it stings several times in a row, bringing the concentration of poison to a lethal level. Australian sea wasp - that’s what this jellyfish is called - it poses a danger to all living organisms, with the exception of the poison of these predators does not affect them, and turtles eat box jellyfish with appetite.

Consequences of an encounter with a sea wasp

Although box jellyfish are extremely dangerous to human life, they do not attack them themselves; on the contrary, they tend to swim to the side. It can sting a person purely by accident. Often the victims are scuba divers who are not protected by special suits.

When the skin comes into contact with the tentacle, terrible pain, severe redness and swelling appear. A person's heart most often stops and he drowns. Some managed to get ashore, but paralysis of the respiratory system occurred, and the person died. After autopsies, it was discovered that the victims' respiratory organs were filled with mucus, while others died from cerebral hemorrhage. There were cases where a person did not die immediately, but no one remained alive.

Protecting the lives of vacationers

During the jellyfish migration season, net barriers are installed on beaches to prevent them from entering the swimming area. Despite this, small specimens penetrate through the mesh cells, so the beach administration warns vacationers about the danger and strictly prohibits them from entering the water.

This warning should not be ignored. After all, the fast-acting poison of the sea wasp leaves no hope of salvation. The only way to help is to administer an antidote - antitoxic serum and urgently hospitalize the victim. But this does not give any guarantee of saving life.

1. It is known that jellyfish appeared more than 600 million years ago, much earlier than dinosaurs, crocodiles and sharks.
2. Jellyfish and polyps are different stages of the life period of the same creature.
3. A sea wasp is a jellyfish that breathes through its entire dome and stings like a wasp.
4. The absence of a brain does not prevent them from perceiving nervous stimulation from the organs of touch and vision.
5. They have two nervous systems.

Jellyfish are able to move underwater by sucking in and expelling water by contracting their parasol muscles, but they mostly drift thanks to the current. Scientists believe that they belong to plankton.

These animals are 95% water, they have no brain and eat and defecate from the same canal, but jellyfish are equipped with amazingly complex and effective weapon. Most species have stinging cells called nematocysts (cnidocysts). Before these cells release their sting, the internal pressure reaches up to a frightening 2000 psi (136 atmospheres) after which they crack, releasing their toxin like a harpoon. This is one of the fastest movements in nature and even faster than a bullet.

Although they have evolved to attack small fish, the sting of a jellyfish also plays a defensive role. Depending on the sting, toxicity to humans ranges from mild irritation to a potentially fatal condition where death can occur within minutes.

So, after much research and without further ado, we present to you the most dangerous jellyfish, known to man.

5. Sea Nettle (Chrysaora)

Photo. sea ​​nettle

Sea nettles are common along both coasts North America. They appear to be most often seen near the Chesapeake Bay. Here they join together and form huge flowers (the technical term for a variety of jellyfish) that pose a threat to swimmers during the summer months.

Large jellyfish reach up to 30 cm (1 ft) in diameter. They have 24 tentacles that reach over 2m (6ft) in length and are where the infamous stinging cells are found.

Touching sea nettle can be extremely painful and will leave a painful rash on the skin for about an hour. They are not dangerous at all, although medical attention is very rarely necessary. There are reports that the bites of the more exotic Chrysaora species are more severe.

4.Cyanea capillata

Photo. Hairy cyanea

The hairy cyanea is the largest species of jellyfish known to man. In diameter it can reach up to 2.5 m (8 ft) or more, and with tentacles stretching over 30 m (100 ft), these jelly monsters can weigh about a quarter of a ton. They also gather in large flocks, which means their convergence on your local beach could seriously disrupt your holiday.

Hairy cyanea is a cold-water species and can be found throughout the North Atlantic, including the UK. It may also be found in cold Australian waters, where some lifeguards allegedly wear tights to provide partial protection from bites.

The bite itself can be quite painful and many sources (including National Geographic) describe it as potentially fatal. It is known that, like most jellyfish, the sting remains active for a long time after the death of the jellyfish itself. In a recent incident on a beach in New Hampshire, USA, cyanea was cut by screws and individual tentacles reportedly stung 150 people.

3. Portuguese Man of War (Physalia physalis)

Photo. Portuguese man of war

To be honest, the Portuguese man-of-war or dung fly (physalia) is not a jellyfish. In fact, it is not even one animal. It is a colony of organisms working together in peace and harmony. The name comes from the air filling the bubble, which acts as a sail and a sail, and in the 17th century it reminded people of naval vessels, which is when it was called a warship.

In Australia it is called blue bottle because it is blue.

The ship is found in all the world's oceans and has even been spotted as far north as Scotland, this is largely due to warm current Gulf Stream.

The bite of the Portuguese man-of-war is very painful, with about 10,000 bites occurring annually in Australia alone. The bite itself is characterized by a painful sensation, as if you were hit with a whip on the skin. This can last from one hour to several days. The main risk is the systemic effects of the poison. In severe cases, intense pain is followed by fever, shock and impaired heart and lung function, which can lead to death.

In August 2018, dozens of jellyfish were spotted on the beaches of the Indian city of Mumbai and stung more than 100 people on the beaches of Juhu and Aksa, causing panic and fear among people. The poisonous sting of the Portuguese man-of-war can kill fish, but not people. Some shopkeepers tried to help victims by rubbing lemon on the affected area for immediate relief. “You should pour a small amount of vinegar on the affected part and hot water" said State Fisheries Commissioner Arun Vidhale at the time.

2. Irukandji jellyfish (Carukia barnesi)

Photo. Irukandji jellyfish

Irukandji jellyfish are small in size, which is perfectly compensated by the strength of their poison. It got its name from the Irukandji, a tribe in Northern Australia where these jellyfish were first seen. However, this jellyfish is very widespread and can be found very far away, even in the British Isles.

At just 5 mm (0.2 ins) in diameter and with tentacles less than 1 mm, it is one of the smallest members of the order box jellyfish. The venom is insanely strong and is considered the most poisonous animal on earth, more than 100 times stronger than that of a cobra. In addition to this, the Irukandji jellyfish is unique in the structure of its stinging cells as well as its tentacles.

The only reason this animal is not at the top of the list is its small size. Despite this, its bite is without a doubt potentially fatal to humans. One bite will not kill unless appropriate treatment is given. Non-critical bites can lead to Irukandji syndrome, when symptoms such as excruciating cramps, severe back and kidney pain, burning of the skin and face, vomiting, headache and increased heart rate appear. Victims also described a “feeling of doom.” The good news is that the bite itself is not very painful!

1. Sea wasp (Chironex fleckeri)

Photo. sea ​​wasp

It goes without saying that this is the most poisonous and deadly jellyfish found in Australia. The variety of box jellyfish, known as sea wasp or sea stinger, are widely considered to be one of the deadliest creatures on earth. Along with other box jellyfish, they are responsible for at least 5,568 officially recorded deaths since 1954. In Australia, these jellyfish kill 1 person every year and another 100 people in Southeast Asia.

The 15 tentacles can reach up to 3 meters (10 feet) in length and are each covered with about half a million poisonous microscopic stinging cells. Each animal is estimated to contain enough poison to kill 60 adults. The poison acts too quickly and can kill in a few minutes, causing cardiovascular failure. It also affects the nervous system and skin cells.

Video. Box jellyfish - Sea wasp

In fact, the sting has been compared to the touch of a red hot iron. It has also been reported that the pain can be so severe that it can lead to shock, followed by drowning or cardiac arrest. The pain may continue for several weeks and then leave scars on the body that resemble marks from a whip.

With 24 eyes, four brains and an impressive 60 anal regions (whatever those are), she is certainly an advanced and formidable creature.

For many residents of central Russia, who need to travel a considerable amount of time to the nearest sea, the concept of “jellyfish” is something unusual and exotic. Many people don’t even know the difference between a jellyfish and a starfish. But those who live close to the sea or often go there on vacation are familiar with jellyfish firsthand, and some have even had the misfortune of encountering them.

Our article today is devoted, as you might have guessed from the introduction, to jellyfish, which in official science are classified as plankton, even those that can weigh several tens of kilograms. Let's consider how this exotic living in the salt water of the seas and oceans can be dangerous, how to protect yourself when meeting a jellyfish, and what first aid should be provided if a jellyfish sting does occur. Although, it would be more correct to say a jellyfish sting, since it has neither a mouth nor teeth. At least in the generally accepted sense.

Medusa - first acquaintance

Jellyfish are a separate type of plankton that most often live in the salt water of seas and oceans. In total, about 200 different jellyfish are officially documented in the world, and there is a clear belief that this is far from the final figure.

This type of living beings is characterized by certain anatomical features. The body of the jellyfish consists of a gelatinous translucent umbrella-shaped bell, from the lower part of which tentacles extend. The bell of a jellyfish can pulsate, which is used for movement in the water column, and the invertebrate uses its burning tentacles primarily to capture prey.

Jellyfish live in all salty waters of the World Ocean, from the surface to great depths, depending on the species. However, there are some representatives of hydromedusas that can live in fresh water. Large, often colorful jellyfish are found in large quantities in coastal areas around the world. Moreover, the more colorful the color, the closer to the shore and at the shallower depth it lives.

Jellyfish have roamed the seas for at least 700 million years, making them the oldest multi-organ representatives of the animal kingdom.

Lifespan different types jellyfish life ranges from a few hours to several months. Their life stage ends mainly after spawning has begun. Most large coastal jellyfish live from 2 to 6 months, during which they can grow a millimeter or two, with some species increasing in diameter by several centimeters.

In nature, there is a unique representative of the jellyfish family - Turritopsis dohrnii. Its uniqueness lies, in fact, in its immortality, due to its ability, under certain circumstances, to transform from an adult jellyfish to the polyp stage. According to many data from Japanese researchers, a detailed study of this process in turritopsis is the key to human immortality, since it is believed that genetically this type of jellyfish is not very different from humans.

Jellyfish movement

Jellyfish, as has been proven repeatedly, are the most energy-efficient swimmers of all animals. They move through the water by radially expanding and contracting their bell-shaped organs. The pause between contraction and expansion ensures that two vortex rings are created in the water, which propels the jellyfish forward.

Diet

Jellyfish are carnivorous, feeding on small plankton, crustaceans, fish eggs, small fish and, oddly enough, other jellyfish. The only hole under the bell in the middle serves as both a mouth and an exit hole for the jellyfish. Jellyfish hunt passively, using their tentacles as nets. Their swimming technique also helps them capture prey. When their body expands, is forced out more water, which tightens the volume of potential prey within the range of their tentacles.

Predators of jellyfish

All types of jellyfish are full of enemies who only think about how to eat them. Jellyfish are eaten by their fellow tribesmen, but of other, larger species. Other predators include:

Seabirds do not feed on jellyfish, but they always surround a school of jellyfish, since the movement of their dome-shaped bodies gathers around them a mass of young crabs and shrimp.

How does a jellyfish grow?

Jellyfish have a very interesting type of birth - rather than being born, they grow. For this reason, in official science there are discussions about which kingdom it is more correct to classify jellyfish as plants or animals.

The formation of a jellyfish - flowering - is a complex process that depends on:

• ocean currents,
• nutrients,
• sunlight,
• temperature,
• season,
• availability of prey,
• reducing predation and oxygen concentrations around.

Ocean currents have the ability to gather jellyfish into large schools or “gardens” consisting of hundreds or thousands of representatives. Kind of blooming garden promotes the spawning of jellyfish and the beginning of the growth of polyps - buds attached to the seabed. A jellyfish subsequently grows from the buds like a plant, breaks away and begins to swim freely.

Why is jellyfish dangerous for humans?

As noted above, jellyfish do not have a mouth opening with teeth that they could harm. The worst thing about a jellyfish is its tentacles, which along their entire length are covered with sacs (nematocysts) filled with a toxic substance. The release of a portion of poison from the sac occurs with the help of stinging cells, each of which is armed with a tiny, very sharp sting. As a rule, at the moment of stinging, the stinging cell comes off the tentacle and remains on the surface of the human skin. Thus, after the jellyfish has “clung” with its tentacle, many small injuries occur and the pathological process of the body’s response spills into one large spot.

The toxicity of jellyfish venom varies from species to species, but every member of the family that feeds on live food has poison. It is necessary to neutralize and immobilize its prey. In another case, jellyfish protect themselves from enemies in this way.

If we talk about the inhabitants of Russia, then in the waters of its seas there are no highly poisonous representatives of jellyfish. The main two species, Cornerot and Aurelia aurita, do not pose a danger to humans, although Cornerot can bring a little disappointment, akin to a nettle sting.

It is more difficult for residents of the shores of the Japanese and Mediterranean Seas, and of course the waters washing the shores of the USA and Australia. The sting of local jellyfish can even cause death. These include box jellyfish, which are also called sea wasps, Portuguese man-of-war, hydroids, anemones and fire jellyfish. The Indo-Pacific and Australian waters are considered the deadliest.

Jellyfish usually swim near the surface of the water during twilight or cloudy weather. Bites usually occur accidentally when a swimmer swims into large cluster jellyfish or carelessly handles one of them.

How do jellyfish stings appear?

Common signs and symptoms of jellyfish stings (of any species) include:

Highly toxic poison individual species Jellyfish can affect multiple body systems. These reactions may appear immediately or several hours after the bites. Signs and symptoms of serious jellyfish stings include:

The severity of the reaction depends on:

• Type and size of jellyfish.
• The age, weight and general health of the person. The most severe reactions are more likely to occur in children, people in poor health, and the elderly.
• How long does skin contact with stinging cells last?
• The area of ​​the affected skin area.

First aid for jellyfish stings

Everything described below is relevant for any person who has been stung by a jellyfish, regardless of its type:

Of course, it is very desirable to know what type of jellyfish a person suffered from. Locals, as a rule, are well versed in these issues and own different ways neutralization, much like we know about how to deal with mosquitoes and their bites. For people who visit seashores relatively rarely and for whom jellyfish are exotic, something exotic and incomprehensible, the best option will still contact a medical institution as soon as possible in order to avoid various kinds of complications. Moreover, it is not always clear what kind of living creature stung the leg in muddy depths of the sea Oh.

Jellyfish are the oldest Marine life, which appeared hundreds of millions of years ago. These underwater inhabitants got their name due to their resemblance to mythical creature- Medusa Gorgon. The body of these animal representatives sea ​​world more than 90% consists of water. Their favorite place habitats are salt waters. Translucent creatures are the object of research by scientists. The poisonous and largest jellyfish are of particular interest.

10. Irukandji jellyfish 10 centimeters

- one of the most poisonous Pacific jellyfish. The main habitat is Australian waters. The diameter of its dome is about 10 centimeters. Irukandji has four tentacles, the length of which can reach 1 meter. A jellyfish sting is dangerous to humans and can cause a number of unpleasant consequences: pain throughout the body, nausea, vomiting, tachycardia and even pulmonary edema. IN in rare cases death may occur. Irukaji's venom has a slow-acting property, so symptoms may appear over several days. Despite its small size, it poses a certain risk for swimmers.

9. Jellyfish Pelagia 12 centimeters

(Night Light) is one of the most beautiful disc jellyfish, which is common in the waters of the World and Atlantic Oceans, as well as in the Red and Mediterranean Seas. The body diameter of the jellyfish reaches 12 centimeters. The color of the umbrella is purple-red and has ornate frills around the edges. In addition to stinging cells and tentacles, Pelagia has four oral cavities. The jellyfish begins to glow the moment it comes into contact with any objects. The main living creatures that the Nightlight feeds on are benthos, sometimes fry and crustaceans. The jellyfish poses a certain danger to humans, since its injected poison causes burns and, in some cases, shock.

8. Portuguese man of war 25 centimeters

(Physalia) - a jellyfish is a “sailboat”-shaped bubble floating on the surface of the water. The body of the “sailfish” is 25 centimeters, but the tentacles of Physalia can reach 50 meters, which it hides under water. It has a beautiful blue or purple color. The Portuguese man-of-war prefers to feed on fish larvae and small squid. Physalia is one of the most poisonous sea jellyfish. Upon contact with its tentacles, a person receives a severe burn, which is accompanied by acute pain. The injected poison can paralyze all vital organs, so it is difficult for a stung swimmer to stay on the water, and the person drowns. The Portuguese man-of-war is easy to spot from afar, thanks to its bright and beautiful coloring, so you can avoid encountering it while sailing.

(Eared jellyfish) is one of the most common types of large jellyfish. Aurelia's body is almost transparent and reaches 40 centimeters. Numerous thin tentacles have stinging cells that strike prey. Four oral lobes resemble drooping ears, which is why Aurelia received the name Ushastaya. This species feeds mainly on plankton and crustaceans. The eared jellyfish does not pose a danger to humans, and its bite can only cause a burn. IN Asian countries Aurelia is used to prepare exotic dishes.

6. Australian Sea Wasp 45 centimeters

- the most poisonous inhabitant of the World Ocean. The main habitat of the species is the coasts of Indonesia and Australia. The dome of the Sea Wasp is 45 centimeters and is equipped with 60 tentacles, which can reach more than 3 meters when hunting prey. The sea animal has 24 eyes. It instantly stings a passing object in several places at once. Death from poisonous jellyfish stings can occur in just a few minutes. A swimmer who is stung receives enough to cause a heart attack and often drowns. It is quite difficult to notice this jellyfish due to its transparency. The Australian wasp feeds on small fish and shrimp.

5. Corner mouth 60 centimeters

- one of largest sea jellyfish, living in Black and Mediterranean seas. The weight of the sea dweller can reach 10 kg, and the diameter of the dome is 60 centimeters. For humans, Cornerot poses no danger and can only cause mild irritation upon contact with the tentacles. The cornerota umbrella is a “haven” for small fish that hide under the dome from danger. This species feeds only on plankton. Jellyfish are actively used in medicine for the preparation of medicines, as well as in cooking. In Japan, Thailand and China, a variety of dishes are prepared from Cornerot.

4. Purple striped jellyfish 70 centimeters

One of the largest and most graceful jellyfish, living in the Gulf of Monterey. The dome of the animal reaches 70 centimeters and has saturated color. A Purple Jellyfish sting can cause severe burns to a person. This type has not yet been thoroughly studied by science, so there is very little information about the animal.

(Sea nettle) - an inhabitant of the Pacific Ocean reveals the three largest jellyfish in the world. The body of an adult Chryasora can reach 1 meter, and its numerous tentacles can reach 4 meters. Tentacles severed from the body can exist separately in the depths of the sea for several weeks and sting. Sea nettle stings leave burns in the form of thin welts. Victims experience sharp pain and burning, but do not pose a danger to human health. Chryasora is one of the most beautiful representatives of its species, so the animal is often kept in oceanariums and aquariums. In the ocean, sea nettle feeds on plankton and small jellyfish.

(Lion's mane) - one of the largest species of jellyfish found in the seas Far East. Nomura measures 2 meters in size and can weigh up to 200 kg. Marine animals cause harm to the fishing industry. A giant hairy ball gets caught in the net, tangling it. When the fishermen try to free the net, Nomura sharply stings the man. In case of an allergic reaction to the poison, death from a Lion's mane bite is possible. From time to time, large accumulations of Nomura are observed off the coast of the Sea of ​​Japan.

1. Hairy Cyanea 2.3 meters

It ranks first among the giant jellyfish in the world. The body of individual individuals of Cyanea can reach 2.3 meters, and the length of the tentacles is 37 meters. The main habitat of this species is seas and oceans. These jellyfish rarely approach the shores and prefer to exist at depths of 20 meters. Giant Cyanea does not pose a serious danger to humans. Its bite can only cause a burn. Large individuals feed on plankton and other jellyfish.

Man, as a land creature, has always been a little afraid of the depths of the sea. There, the “crown of nature” lies in wait for many animals, which sometimes people are unable to cope with. One of these is Chironex fleckeri, the most dangerous jellyfish in the world. Their distribution range is the north of Australia and the islands of Indonesia in the Pacific and Indian regions.

From November to May, the most poisonous jellyfish in the world can be found near the shore, where they swim to breed. The beaches of Australia are usually empty at this time of year, and special signs are installed for tourists warning of danger, and those who want to swim are usually not noticed. Using nets underwater for protection is not rational, since another poisonous jellyfish, the irukandji (the size of a fingernail), which lives in the same waters, is capable of passing through all obstacles.

Chironex fleckeri is a cubic jellyfish, so its other names are box jellyfish or Australian wasp jellyfish.

On the surface of the tentacles of one specimen there are many stinging cells, which can kill up to 60 people in a few minutes. More than 100 deaths have been officially recorded over the last century alone.

Among their fellows, the class of box jellyfish is considered quite developed - they do not just move with the flow, but choose a direction. The speed of the most dangerous jellyfish in the world is 3-4 knots (about 2 meters per second). In addition, she can see - there are 4 groups of light-sensitive elements on the sides, consisting of 24 eyes. It has not been scientifically proven whether they are used for tracking or recognizing objects, but a poisonous jellyfish that can track its prey, you see, changes the idea of ​​it as a harmless piece of jelly, which is abundant in the sea. In the photo is an Irukandji jellyfish.

The danger of the wasp jellyfish is that it simultaneously affects nervous system, skin and heart. A person in a state of shock experiences an incredible burning sensation and excruciating pain, which prevents him from quickly getting to the shore or into the boat. It happened that people died within 4 minutes from a heart attack after coming into contact with the tentacles, without even having time to ask for help (this is much faster than when contacting any poisonous snake or spider). The only way to neutralize the poison is with vinegar; all other methods (rubbing, bandaging) will only aggravate the problem.

The jellyfish is quite large (the diameter of the dome reaches the size of a basketball, up to 30 cm). Its color is pale blue and transparent, which allows it to get close to the victim. This is usually what the world's most poisonous jellyfish does - it floats freely, waiting for some small fish to stumble upon one of its deadly tentacles.

At each corner of the dome there are 60 tentacles, which contract when moving from 15 cm to 3 meters. Interestingly, even when washed ashore and dried by the sun, the box jellyfish retains its deadly poison. When it gets wet (for example, when barefoot) a person can get burns that will bother him for several more weeks and scars that will then remain for life. And the lethal dose of poison is contained somewhere in 3 meters of tentacles (5000 stinging cells).

The main food of these marine animals is small fish and shrimp. But turtles are very fond of eating the most poisonous jellyfish in the world, which over millions of years of evolution have become completely insensitive to its toxins.

The ancient Greek myth about the Gorgon Medusa is incredibly suitable for this most dangerous jellyfish in the world - if the first one turned all living things into stone at one glance, then the Australian wasp is capable of killing a person even with a second touch (especially if he has heart problems). And those who want to go diving in the north of Australia should watch a video about this marine life to know the enemy by sight.