Box jellyfish, sea nettle jellyfish, moon jellyfish… are terrifyingly poisonous jellyfish in the sea. During the breeding season, they can swim close to shore and anyone can be bitten, especially during the tourist season.

 Abox jellyfish bite will cause the heart to stop beating for a few minutes

Box jellyfish bites will cause the heart to stop beating within minutes and are the most dangerous jellyfish in the world. 

This is one of the most dangerous creatures in the world. Box jellyfish tentacles can be 3 m long, with more than 5,000 stinging cells on each tentacle. They use venom to kill prey or enemies. A small amount of this toxin is enough to kill a person. Box jellyfish venom affects the heart and nervous system and can cause the heart to stop beating within minutes. Medical experts say cases of box jellyfish stings require urgent treatment.

Irukandji jellyfish causes increased blood pressure and heart rate

The venom of this peanut-sized jellyfish increases blood pressure and heart rate. Until now, scientists have not found a detoxifying serum. Irukandji jellyfish mainly live in waters around Australia.

Irukandji jellyfish  , about the size of a peanut, increase blood pressure and heart rate.

Only about 2.5 cm across and almost transparent, the Irukandji jellyfish is a relative of the box jellyfish, and the victim will often not know it until they begin to experience symptoms such as vomiting, headaches, and heart palpitations. heart rate and blood pressure increase, even pulmonary edema. This condition lasts from a few hours to many days, and the victim needs treatment and monitoring.

Portuguese man o’war jellyfish paralyzes its prey and causes death

Portuguese man o’war jellyfish are symbiotic assemblages that paralyze their prey and cause death.

This carnivore is not actually an organism but a collection of symbionts, using venomous tentacles to tightly wrap and paralyze its prey. Their tentacles shine in the dark to lure prey. Their stings cause lasting pain to humans, and can even cause the victim to lose their life.

Lion’s Mane jellyfish causes suffocation and heart failure

Lion’s Mane jellyfish causes suffocation and heart failure.

Commonly found in the Arctic and northern Atlantic Ocean, the Lion’s Mane jellyfish has venom that causes muscle paralysis, leading to suffocation and heart failure. Their tentacles can be up to 3 meters long, covered with stinging cells that can cause burning and cramping as soon as they come into contact with the victim.

Sea nettle jellyfish cause pain

Sea nettle jellyfish pump toxins from their stinging tentacles.

The jellyfish is called Sea Netle because its body shape resembles a nettle. They have 24 tentacles, an average length of 1.8m. The poison pumped from the tentacles is enough to make the opponent feel pain but usually does not affect life. Sea nettle jellyfish are commonly found in the Chesapeake Bay areas of the far east coast of the United States.

Lion’s mane jellyfish can kill people in the blink of an eye 

Lion’s mane jellyfish has a unique shape and can be deadly.

This is considered a sea creature with a beautiful appearance and attracts the attention of beachgoers. Lion’s mane jellyfish are also giant in size, an adult jellyfish is about 2.4m in diameter, their tentacles can reach more than 30m. This can be considered a giant, bizarre jellyfish that often gathers in large groups. Lion’s mane jellyfish is also a deadly species with just one sting enough to kill a human.

Although moon jellyfish do not die when bitten, they still cause pain

With a beautiful shape similar to the Moon, this lunar jellyfish also contains a horrifying poison.

This is a fairly common jellyfish, even when you are in the swimming pool you can easily see them. Moon jellyfish also sting humans, but with a fairly mild toxin content and are not considered dangerous to scientists. However, they are often exaggerated by fishermen and beachgoers as being deadly. In fact, moon jellyfish are harmless.

Cannonball jellyfish

The lion jellyfish is nicknamed the toxin killer.

Cannonball jellyfish are also accused by swimmers of being toxic killers. However, like moon jellyfish, they are gentle, harmless and rarely sting people. Cannonball jellyfish often get caught in fishermen’s nets.

Jellyfish the war monger

The warring jellyfish is a stinging jellyfish with tentacles and venom that causes intense pain.

They are also called Portuguese man o’war or Physalia physalis, stinging jellyfish with tentacles and venom that causes intense pain and is dangerous to humans. They have a beautiful appearance but are one of the most deadly jellyfish in the world. Their sting is like a whip, causing pain for several days. Their venom can cause fever and shock, then cause the heart or lungs to stop working and lead to death.