Top 10 largest jellyfish in the world

Jellyfish are inhabitants of seas, oceans and large freshwater bodies. Gelatinous umbrellas of various shapes, not so harmless. Among the jellyfish, there are deadly species. Poisonous substances contained in stinging cells are used in pharmacology.

The gelatinous invertebrates were named jellyfish only in the 18th century because of the similarity of the tentacles with the snake hair of the mythological Gorgon. There are more than 200 varieties of these creatures in different sizes and colors. In the article you will learn about the largest jellyfish in the world that live in the seas and oceans.

10. Medusa Irukandji (10 cm)

Medusa Irukandji

A 10-centimeter jellyfish Irukandji with meter-long tentacles is more dangerous than a cobra. She lives off the coast of Australia. After a sensitive burn within 20 minutes, there is a severe heart attack, pulmonary edema, stomach cramps, wild pain throughout the body. Dangerous for swimmers and fishermen.

Irukandji is named after the aborigines. For a long time, the Indians could not understand what kind of diseases affect them after each exit to the sea. When one of the doctors identified the source of the danger, they began to carefully disassemble the nets. The tentacles are covered with stinging cells that produce poison. Any touch causes Irukandji syndrome.

9. Medusa Pelagia (12 cm)

Medusa Pelagia

Pelagia is ranked ninth in the list of the largest jellyfish in the world. The dome of the glowing Pelagia does not exceed 12 cm. Nightlight is an inhabitant of the shallow waters of the warm waters of the Pacific and Atlantic Ocean, it is found in the Mediterranean and Red Seas. It attracts the attention of divers with its variegated color, ranging from pink and purple to golden.

Jellyfish is capable of emitting a light pulse from contact with any objects. Waves of beautiful creatures are often thrown ashore. The danger for people is represented by 8 stinging zones in the edge of the hood, they emit poison with such force that it immediately penetrates the skin. The burn causes itching, irritation, allergies. Poorly healing blisters form on the skin.

8. Portuguese boat (25 cm)

Jellyfish portuguese boat

A strange jelly-like creature called the Portuguese ship or physalia lives in all parts of the world’s oceans. This jellyfish-shaped siphonophore is a 25-centimeter bubble in the form of a sailboat with long filaments of tentacles reaching 50 m. It looks very attractive, there are blue and purple varieties of physalia. They are all poisonous.

The substance contained in the tentacles burns, provoking acute pain, paralyzing nerve cells. It is difficult for a swimmer who finds himself in a siphonophore colony to escape from burns. If help does not arrive in time, the person will die. The gelatinous bubbles of Portuguese ships are visible from afar, they stick to the surface, entwine their prey with tentacles.

7. Aurelia (40 cm)


Aurelia or eared jellyfish is the most common invertebrate species. The body is in the form of a deep tea saucer with four symmetrical clots at the center reaches 40 cm. Large jellyfish can be found in southern latitudes, temperate zones and in the cold seas of the Arctic. They live in colonies and singly, in coastal areas and at shallow depths. They move slowly: they emerge, collecting the dome to the center, and descend, spreading their numerous tentacles charged with stinging cells to the sides. The poison is not very dangerous, it can cause a slight burn. In Asian countries, aurelia is eaten, exotic dishes are prepared from it.

6. Australian sea wasp (45 cm)

Australian sea wasp

The sea wasp jellyfish, which lives mostly in the coastal resort area of ​​Australia, is found off the coast of Vietnam, Thailand, Indonesia, Malaysia, Brunei, the Philippines, and New Zealand. It is considered the most dangerous for humans. A 45-centimeter dome, 60 tentacles that extend up to 3 meters in length during the hunt, 24 eyes are the hallmarks of the deadly giant.

A person from a burn in a minute has heart paralysis. When colonies appear at a short distance from the coast, the beaches are closed. The poison of one ohma can kill up to 60 people, the tentacles of a dead jellyfish remain poisonous for two weeks. But sea turtles are not afraid of poison. They enjoy the gelatinous mass with pleasure.

5. Cornerot (60 cm)

Medusa Cornerot

Cornerot is one of the largest jellyfish in the world, found in the southern oceanic coastal areas, the Black and Mediterranean seas. The dome grows up to 60 cm, thick tentacles similar to roots emerge from it. These are underdeveloped oral processes, covering with stinging cells with a poisonous substance that causes burning and itching, similar to allergic rashes.

There are few tentacles, they are slightly longer and narrower than the processes. The cornerot moves horizontally, rather quickly. Uses jet thrust to quickly move the canopy. Jellyfish reaches 10 kg, hunters hunt for it – the poison of cornerot is used in pharmaceuticals. In Asian countries, it is included in the menu of many restaurants.

4. Purple striped jellyfish (70 cm)

Purple striped jellyfish

The purple striped jellyfish is a rare, poorly understood species. There are 70 centimeter giants off the coast of Southern California. They amaze with the beauty of the colors. With age, symmetrical dark stripes and chaotic spots appear on the colored parachute canopy.

With their tentacles stretching up to 2 meters, they leave traces on the body of swimmers, similar to lashes. Burns are not dangerous, but take a long time to heal. In 2012, a massive defeat of vacationers on the beaches of Monterey was recorded, jellyfish appeared in the water after a storm.

3. Medusa Chrysaor (1 m)

Medusa Chrysaor

In third place in the ranking of the largest jellyfish in the world Golden Chrysaora or sea nettle. It is a meter-long giant that continues to grow throughout its life. Outwardly, Chriasora resembles a lady’s hat with strings and a veil, strikes with colors and a clear shape. Numerous tentacles hanging from the edges of the tentacles reach 5 meters in length. They are collected in 8 groups arranged symmetrically.

The poison contained in stinging cells is like nettles: burns pass quickly, do not leave traces. These large jellyfish are found in the eastern and western shelves of the Pacific Ocean from Canada to Mexico. The jelly-like creature is named in honor of the mythological Chrysaor – the son of the Gorgon and Poseidon.

2. Bell of Nomura (2 m)

Medusa Bell Nomura

The second largest jellyfish is the Bell Nomura or Lion’s Mane. This is a poorly studied species. The dome grows up to 2 meters, densely growing tentacles resemble a bump overgrown with grass. The weight of the giants reaches two centners. The giants are capable of damaging the nets, splashing poison when trying to free them. In 2009, due to the accumulation of jellyfish in the nets, a fishing boat sank.

Burns for a person are not fatal, but unpleasant, the poison burns through the robe, leaving red stripes. Toxins often cause allergies. Giants live in the Far Eastern shelf, off the coast of the Sea of ​​Japan, in the waters of Korea and China. The species was described only in 1921 by the director of the fisheries of the Japanese prefecture of Fukui. Previously, yellow jellyfish were called sea gourds.

1. Hairy Cyanea (2.3 m)

Hairy Cyanea

Hairy cyanea is the largest jellyfish in the world. On a deep-sea bathyscaphe, Cousteau’s team discovered a giant 2.5 in length with 42-meter tentacles. It owes its name to its long, fluttering tentacles. The poison is not dangerous for people. The size of the giants depends on the habitat, the possibilities of the food base.

Beautiful luminous creatures often rise near the surface, drift for a long time. They are nailed to the shores only after a strong storm. In 1870, residents found on the shores of the Massachusetts Bay a gigantic cyanea, surpassing the size of a blue whale.

The cold shelves of the Pacific and Atlantic oceans are chosen for habitation. The dome of the cyanea is not solid, but is divided into 16 sectors, separated by deep recesses. When the dome is straightened, the jellyfish resembles an open bud lying on the edges of a vase.

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