Atolla Jellyfish: 21 Facts You Won't Believe!

Atolla Jellyfish Fact File

Did you know that jellyfish have been around for almost 500 million years? These intriguing aquatic creatures lack a respiratory system, central nervous system, and circulatory system, exactly like other jellies. They don't have a brain because they don't have a central nervous system! Atolla jellyfish live in the midnight zone of the world's deepest oceans, ranging from 3280-13000 ft (1000-3962 m) from the surface. Their bodies are bell-shaped, dark red in color that helps them to blend in the darkness of the ocean. However, when they are threatened, they emit a bioluminescence fluid that gives the impression of blue light on top of a police car! This defense strategy attracts other dangerous and larger predators, which fight the jellyfish's attacker and save its life. Due to this, they are also known as alarm jellyfish. They have 20 long tentacles and one longest tentacle, known as the hypertrophied tentacle, that helps them to catch prey. All members of the Atollidae family have a distinctive crown-like groove running through their bell-like bodies. They have developed these adaptations since they live in such a harsh environment. The diet of Atolla wyvillei jellyfish consists of small crustaceans and other nutrient matter.

Read on to know more intriguing information about these stunning marine species. If you like this article, you can check out box jellyfish and immortal jellyfish.

Atolla Jellyfish

Fact File

What do they prey on?


What do they eat?


Average litter size?


How much do they weigh?


How long are they?

Diameter- 0.8-6.8 in (20-174 mm)

How tall are they?


What do they look like?

Deep red

Skin Type


What are their main threats?

Humans, shrimp

What is their conservation status?

Not listed

Where you'll find them



All across the world





Scientific Name

Atolla wyvillei





Atolla Jellyfish Interesting Facts

What type of animal is an Atolla jellyfish?

The Atolla jellyfish, also known as the alarm jellyfish or Coronate medusa, is a kind of crown jellyfish.

What class of animal does an Atolla jellyfish belong to?

Atolla jellyfish (Atolla wyvillei) is a marine creature that belongs to the Scyphozoa class. These species are a close relative of crown jellyfish.

How many Atolla jellyfish are there in the world?

Atolla wyvillei can be found in the deep oceans all over the world. As a result, it is impossible to estimate their population.

Where does an Atolla jellyfish live?

These species can be found in the deepest parts of all oceans throughout the world.

What is an Atolla jellyfish's habitat?

Atolla jellyfish (Atolla wyvillei) live in the ocean's midnight zone, at depths ranging from 3280-13000 ft (1000-3962 m). This area is known as a midnight zone because it does not receive any sunlight.

Who do Atolla jellyfish live with?

There is not much information about who Atolla jellyfish live with. However, it is known that usually marine creatures that belong to the Scyphozoa class sometimes stay in a group and sometimes are solitary.

How long does an Atolla jellyfish live?

There is no information on how long these marine animals live. However, most jellyfish, according to the study, have a maximum lifespan of one year.

How do they reproduce?

These marine creatures can have asexual, as well as, sexual reproduction. According to the study, the long, hypertrophied tentacles help the males to fertilize the eggs of the females. Like most jellies, the adult phase of these species is also known as the medusa stage. During this time, jellyfish can reproduce by releasing eggs and semen into the sea. Asexual reproduction happens once they mature into polyps, and they move on to become ephyra, which subsequently forms into an adult medusa.

What is their conservation status?

The Atolla jellyfish's conservation status is unknown. However, due to climate change, water pollution, and overharvesting, a few species that belong to the Scyphozoa class are on the verge of extinction.

Atolla Jellyfish Fun Facts

What do Atolla jellyfish look like?

The Atolla jellyfish, being a deep-sea dweller, has evolved some excellent adaptations to protect itself from the cold environment as well as the predators hiding in the dark ocean. The bell-shaped body has a diameter ranging from 0.8-6.8 in (20-174 mm) and is dark red in color that allows it to blend in with the dark and deep sea. However, when they are threatened, they emit a bioluminescence fluid that gives the impression of blue light on top of a police car! This phenomenon is a defense strategy of these jellies. Since blue light travels the longest distance in the dark ocean, it attracts other potential and bigger predators that eventually gobbles the predator of the jellyfish, thus saving its life. These creatures have 20 long tentacles and one longest tentacle which is known as the hypertrophied tentacle that helps them to catch prey.  All members of the Atollidae family have a distinctive crown-like groove running through their bell-like bodies.

*Please note that this is an image of a moon jellyfish, not an Atolla jellyfish. If you have an image of an Atolla jellyfish, please let us know at

Atolla jellyfish has a deep red-colored body.

How cute are they?

Atolla jellyfish ((Atolla wyvillei) is quite adorable. These marine creatures are fascinating to observe. When they secrete a bioluminescence fluid, they emit their own blue light, which attracts people's attention. They have tentacles as well, which are amazing to watch.

How do they communicate?

Atolla jellyfish, like the majority of jellies, lack a respiratory system, central nervous system, or circulatory system, and therefore their communication methods are restricted. Based on the information we have, we may deduce that these species communicate mostly through the light they create and their sense organs. These species use bioluminescence as their defense strategy to protect themselves from predators in the deep ocean.

How big is an Atolla jellyfish?

The Atolla jellyfish is a bell-shaped jellyfish with a diameter ranging from 0.8-6.8 in (20-174 mm). It is almost the size of flower hat jellyfish.

How fast can an Atolla jellyfish swim?

Atolla jellyfish have been identified to be efficient swimmers by some scientists. However, they are assumed to be drifters, like all jellyfish species, whose speed and direction are regulated by the tides and water currents in which they dwell.

How much does an Atolla jellyfish weigh?

The weight of these marine creatures is yet to be determined.

What are the male and female names of the species?

Males and females of these species have no unique names. They are simply known as male and female Atolla jellyfish.

What would you call a baby Atolla jellyfish?

Atolla jellyfish go through various stages of growth. Polyps are the term used in the early phases, whereas, ephyra is used in the later stages.

What do they eat?

The diet of Atolla jellyfish (Atolla wyvillei) consists of small crustaceans and other nutritious matter. These marine species have 20 tentacles out of which they use their long hypertrophied tentacle to trap their prey. They keep their tentacles outstretched, catching prey as they try to float straight past it.

Are they dangerous?

Humans are not endangered by these marine species. This is due to the fact that they are deep water dwellers who do not come to the surface, making interaction with people nearly impossible.

Would they make a good pet?

It is not recommended to keep these creatures as pets because their natural home is in the deeper ocean or coastal waters. It would also be difficult to keep these jellyfish healthy and secure without the right care and equipment in terms of maintenance. If you really want to see one, you should visit an aquarium that features these invertebrates.

Did you know...

This species was named after Sir Charles Wyville Thomson, the Challenger expedition's main scientist.

There are six species of jellyfish in the Atolla genus.

What parts of the Atolla jellyfish light up?

It is the bell-shaped bodies of these species that emit flashing lights. Due to the midnight zone and the darkness all around, this blue blinking light travels a long way in the sea.

How does bioluminescence help the Atolla jellyfish survive?

When they are threatened by a predator, they secrete a bioluminescent fluid that produces blue blinking light that makes the Atolla jellyfish glow in the dark. This Atolla jellyfish bioluminescence lures larger predators, which eventually attack the predator of these species, thus saving it.

Here at Kidadl, we have carefully created lots of interesting family-friendly animal facts for everyone to discover! For more relatable content, check out these hydrozoan jellyfish facts and moon jellyfish facts pages.

You can even occupy yourself at home by coloring in one of our free printable jellyfish coloring pages.



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