Where are jellyfish most dangerous and why do jellyfish die?

Australian Box Jellyfish!

Last year, it was ranked 3rd among the 10 most dangerous animalsIt can be seen that people are afraid of it! It is so small that a person who is impaled by its tentacles will die within 3 minutes.

It is the most poisonous jellyfish in the world, one of the most poisonous marine creatures in the world, and it ranked third in the top 10 deadly animals last yearIt can be seen that people are afraid of it!

At present, the only way to avoid sea wasp attacks is to avoid swimming in the jellyfish-infested waters. Currently, warning signs have appeared on all beaches in northeastern Australia to alert people to this jellyfish.

Let's give you a reference and see what makes this little thing different from the traditional "dangerous animals".

It is an Australian box jellyfish, more powerful than a cobra (killing one person in 5 minutes).

Australian box jellyfish.

So far, there is no chemical antidote in the location.

When the jellyfish is dying, it will lie motionless at the bottom of the tank, and its antennae will secrete foreign objects that will gradually disappear and fall. At this time, it is best not to touch the jellyfish, otherwise it is easy to be poisoned, most of the jellyfish death is caused by changing the water or improper operation of the water, it is recommended to test the water temperature and salt content first, and then pour the new water into the breeding tank, which can avoid the death of the jellyfish.

Mizuki is usually very lazy before he dies, and he doesn't like to swim around, and usually lies quietly at the bottom of the tank. At this time, do not touch jellyfish to determine whether they are dead, otherwise it is easy to cause poisoning.

Secondly, after about a day or two, the tentacles of the jellyfish will secrete a net-like silk thread, which will gradually disappear and fall, indicating that the Iwataka jellyfish is already on the verge of death. It won't be long before the jellyfish shrinks in size and gradually turns into a puddle of water.

Jellyfish have extremely high requirements for water temperature and quality, and once the water is changed or used incorrectly, it may cause the death of jellyfish. Therefore, it is best not to remove the jellyfish when changing the water, and test the appropriate salinity and water temperature before pouring new water into the breeding tank.

There can be many reasons why jellyfish die, here are some of the possible causes:

1.Unsuitable water temperature: The ambient temperature of jellyfish activity is required to be 22-25 degrees, if the water temperature is too low or too high, it will affect the vital signs of the jellyfish and lead to death.

3.Long-term non-replacement of water: The metabolites of jellyfish will affect water quality, and long-term non-change of water will make the water quality worse, resulting in the death of jellyfish. It is recommended to change the water once a week, 1 to 3 times at a time.

4.Inappropriate light intensity and duration: Strong light has an inhibitory effect on the growth of jellyfish, and jellyfish need the right amount of light to maintain life activities. If the light intensity and duration are not suitable, it can also cause jellyfish to die.

5.Insufficient inorganic salts and trace elements in water: Inorganic salts and trace elements in water are very important for the growth and development of jellyfish, and if these substances are lacking in water, it will also lead to jellyfish death.

6.Disease Infection: Jellyfish can be infected with various diseases such as bacterial diseases, viral diseases, fungal diseases, etc., which can cause the death of jellyfish.

7.Accidental Injury: During a water change or premature transport, a jellyfish may suffer accidental mechanical damage that can lead to death. Cover wheels.

In short, to maintain the health of jellyfish, it is necessary to provide the right water temperature, sufficient food**, clean water quality, appropriate light intensity and duration, and the right amount of inorganic salts and trace elements. At the same time, care should be taken to avoid accidental injuries and prevent disease infection.

Are you buying a freshwater jellyfish or a saltwater jellyfish?

1. It may be that the trace element content of inorganic salts in water is insufficient.

2. The most important reason is that the temperature is too low now, and the general optimal growth temperature of jellyfish is 25 degrees, so if necessary, install a device.

3. It is also necessary to supplement the jellyfish to determine that the liquid feed has a seawater rotifer feed designed for soft bodies, when it is found that the digester and mouth in the jellyfish wing turn orange, it means that the jellyfish has been full.

4. The water change cycle is generally less than two times a month to dig Kai, try not to hurt the jellyfish, do not suck the jellyfish when draining, avoid the generation of bubbles when feeding water, and do not give water too quickly. etc., the water cannot be changed frequently.

The most poisonous jellyfish are: box jellyfish, monk's hat jellyfish, Irukanji jellyfish, Australian box jellyfish, and flower hat jellyfish.

1. Box jellyfish

If you want to ask what the most poisonous jellyfish in the world is called, it must be the box jellyfish, the box jellyfish is a large jellyfish, named after its slightly round shape, like a square box, they are the most toxic creatures known to humans on the earth.

2. Monk's hat jellyfish

The monk's hat jellyfish is a highly venomous jellyfish mainly distributed in the tropical waters of the Atlantic Ocean, named for its resemblance to monks' hats, and they have a touching appearance for dyeing imitations, but their tentacles are covered with countless venomous stinging cells, and the venom inside is as toxic as the venom of a cobra.

3. Irukanji jellyfish

The Irukanji jellyfish are a small jellyfish found mainly in the waters of Australia's Great Barrier Reef, with a petite body of only a few centimeters, but the toxins contained in their bodies are deadly.

4. Australian box jellyfish

The Australian box jellyfish is a type of box jellyfish, also known as sea wasps, which are mainly found in Australia and New Guinea, and have a pale blue transparent appearance with countless venom-storing stinging cells growing on their tentacles.

5. Flower hat jellyfish

The flower jellyfish is a large jellyfish with a very attractive appearance and is considered one of the most beautiful jellyfish in the world, but it is highly poisonous.

The most poisonous jellyfish are the Australian box jellyfish, the Irukanji jellyfish, the trolling jellyfish, the monk's hat jellyfish, the flower hat jellyfish, etc.

1. Australian box jellyfish.

The Australian box jellyfish, also known as the sea wasp, the transparent killer of the ocean, is a jellyfish that lives in Australia and northern New Guinea, the Philippines and Vietnam, and is considered the deadliest jellyfish.

2. Irukanji jellyfish.

The Irukanji jellyfish is one of the most venomous jellyfish in the world, with a petite body of only a few centimeters, but it contains hundreds of times more poison than a cobra.

3. Hand jellyfish.

This box jellyfish is a small version of the jellyfish sea wasp. Despite its small size, this jellyfish has quite a strong impact. They usually live in the waters of the Indian, Pacific, and western Atlantic oceans and are known as "venomous snakes" in Okinawa Prefecture, Japan.

4. Monk's hat jellyfish.

The monk's hat jellyfish can predict storms. It has a buoyancy with long tentacles hanging from underneath. There is a special gland in the sac that emits carbon dioxide, causing it to swell.

Spike jellyfish, Greek means "bubble", it is with the help of this "bubble" that it can rise and fall, so that the jellyfish can float to a place where there is food, or to stay away from predators.

5. Flower hat jellyfish

The jellyfish are one of the few "large" jellyfish in the class Hydra and can reach 18 centimeters in diameter with their umbrella, making them giants compared to other species of hydra jellyfish, which are usually only one or two centimeters in size.

The most poisonous jellyfish is the box jellyfish.

Box jellyfish are the most toxic creatures known to humans on Earth, also known as sea wasps. It also belongs to the first animals of the mountain teaser to evolve eyes. A new study by Swedish scientists has found that box jellyfish have developed a special set of eyes similar to those of humans, which help them deftly avoid obstacles in the ocean.

Unlike ordinary jellyfish drifting in ocean currents, box jellyfish swim nimbly in the ocean, make quick 180-degree turns, and deftly move from object to object.

The box jellyfish has 24 eyes, distributed on the cup-shaped body at the top of the tubular body, these eyes are divided into 4 different types, the most primitive one can only perceive the intensity of light, but the one is more delicate and complex, and can perceive colors and the size of objects like the human eye. The distribution of these eyes allows it to see almost 360 degrees of its surroundings.

To test the box's ability to avoid obstacles, researchers at Lund University in Sweden had the box-jellyfish swim in a pool of water and place different obstacles in the water to make them ridge. It was found that box jellyfish can avoid obstacles of different colors and shapes, but like humans in water, they often can't avoid transparent objects.

Reproductive development of box jellyfish

The life cycle of tank jellyfish is more complex than that of other types of jellyfish. Common adult jellyfish mate in bays and coves, where females lay eggs and males hatch, turning eggs into larvae. The larvae are fixed on the reef where the river flows into the sea.

Here, the larvae turn into polyids. Hydroids begin to reproduce asexually, that is, they divide into many small polyids, forming an army of jellyfish that will appear in December, when the rainy season begins.

The box jellyfish developed from the large jellyfish to the floating larvae, and then gradually developed through the polyp body, and through the direct transformation into the jellyfish body, without going through the proglottid reproduction (transection strobilation) and butterfly larvae (ephyra) stage.

Compared to other species of jellyfish, the box jellyfish spawn only 1 jellyfish per polyp. This is one of the reasons why this jellyfish is so toxic. Scientists have calculated that a newborn jellyfish can grow up to 1 millimeter a day, and its metabolism is faster than that of all other species.

This may be because the box jellyfish is the opposite of other species of jellyfish: the box jellyfish swim actively and can reach speeds of up to 10 kilometers per hour.

When the baby jellyfish grows to 5 to 6 centimeters, they are already adults. Its virulence gradually increases, and it begins to prey on fish. Box jellyfish are very agile hunters and are able to eat fish as big as their own body.

They stalk their prey, trap it within their tentacles, soften it with venom, and then slowly digest the prey permeate.

Jellyfish live in the ocean. They can be found in tropical waters, temperate waters, shallow waters, oceans about 100 meters deep, and even freshwater areas. Jellyfish existed as early as 650 million sail years ago, and they appeared even earlier than the dinosaurs.

There are more than 250 species of jellyfish in the world's waters, and they are found in waters all over the world.

Morphological characteristics: The jellyfish type is usually a monomer, floating or swimming life, a very few species are groups, and some groups can live in sedentary life. The jellyfish-shaped body is bell-shaped or inverted bowl-shaped, or umbrella-shaped, the outward protruding side is called the outer umbrella surface (exumbrella) or the upper umbrella surface, the concave side is called the lower umbrella surface (subumbrella), the ** of the lower umbrella surface has a hanging tube called the manubrium, the free end of the vertical lip is the mouth, the edge of the umbrella has a circle of tentacles, and the edge of the hook hand jellyfish lower umbrella stretches out a narrow membranous structure inward, called the marginal membrane (velum), and the marginal membrane is the characteristic of the hydroid jellyfish.

Jellyfish in the bowl jellyfish class are borderless membranes. The body wall structure of the jellyfish type is basically similar to that of the hydra type, and it is also composed of two layers of epithelial muscle cells sandwiched between the mesocolloidal layer, and the mesocolloid layer of the jellyfish type is much more developed than that of the hydroid.