Fun Nomura's Jellyfish Facts For Kids | Kidadl


Fun Nomura's Jellyfish Facts For Kids

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Nomura's jellyfish are found in the Pacific Ocean near Japan and China away from predators or any threat. These jellyfish have a life span of only about two years, but they reproduce really quickly during that time period so populations don't decrease very much. The best way to tell if you're looking at an adult is by their size - adults tend to be bigger than juveniles as they get older. They're a type of comb jelly that lives in the warm, deep waters of Japan. Nomura's jellies eat plankton and other small organisms floating around them by using eight rows of tentacles to create an opening called its mouth or bell margin for prey capture on their bells' surface area. There are around 150 species in the world and about 90% of them live near Japan. The Nemopilema nomurai has been nicknamed as 'King' because it eats more than other types of jellyfishes do; this also leads many localities to call these creatures a nuisance when they swarm into fishing areas or interfere with beach goers' enjoyment on coasts during summer months. The Nemopilema nomurai has been seen as an invasive species to Japan that should be eliminated. These Japanese magical creatures are also transparent, which means you can see their guts inside them. Some people find these animals fascinating because they have more than 10 mouths on each side of their bell that create powerful stings for catching prey like small fish or plankton from below - so don't touch it if you happen to come across one yourself!

For more relatable content, check out these amberjack facts and giant trevally facts for kids.

Fun Nomura's Jellyfish Facts For Kids

What do they prey on?

Do not prey

What do they eat?


Average litter size?


How much do they weigh?

440 lb (199.5 kg)

How long are they?

11-12 ft (3.3-3.6 m)

How tall are they?


What do they look like?

Yellow, orange, blue, white, black, gray

Skin Type

Jelly-like slimy

What were their main threats?

Sharks, Ocean Sunfish

What is their conservation status?

Least Concern

Where you'll find them?

Seas, The Ocean, Fisheries


Japan And China









Nomura's Jellyfish Interesting Facts

What type of animal is a Nomura's jellyfish?

The giant Nomura's jellyfish (Nemopilema nomurai) is a species of jellyfish-like an immortal jellyfish found in the largest waters and fisheries, with a very peculiar life cycle found mostly in deep seas away from humans.

What class of animal does a Nomura's jellyfish belong to?

The Nemopilema nomurai Japanese species of jellyfish belong to the class Scyphozoa just like a jellyfish and have tentacles that can give humans a very painful sting!

How many Nomura's jellyfish are there in the world?

Scientists have discovered that there are approximately 2.5 million Nomura's jellyfish in the world laying around 45,000 eggs each, but this number is growing and will continue to grow with time.

Where does a Nomura's jellyfish live?

In the waters of Japan and China, you might find a giant Nomura's jellyfish. These are beautiful creatures that inhabit coastal regions and thrive in warm water with low salinity levels.

What is a Nomura's jellyfish's habitat?

Nomura's jellyfish live in the deep sea like an Irukandji jellyfish. Nomura’s jellyfish is a gelatinous animal that appears to be made entirely out of slime! These creatures have been found at depths up to 4000 ft (1,219.2 m) below surface level, which makes them some pretty hardy animals.

Who do Nomura's jellyfish live with?

Scientists had long wondered about what species is Nomura’s jellyfish friend and where could it be found? Recent findings show these creatures may not live alone, as new discoveries show more than one type of Nomura's jellyfish can coexist together inside an area much smaller than expected.

How long does a Nomura's jellyfish live?

Nomura's jellyfish live to be about three years old.

How do they reproduce?

Nomura’s jellyfish have been studied for years in a myriad of detail but their mating process still isn't understood very clearly by scientists. But most believe that every year, the female releases billions of eggs! The male then fertilizes them externally and they are released into the water. As this happens every year, it is called 'annual spawning'.

What is their conservation status?

 This sea species of jellyfish has the conservation status of Least concern.

Nomura's Jellyfish Fun Facts

What do Nomura's jellyfish look like?

Nomura's jellyfishes are a rare kind of fish found only near Japan which typically grows into mandala shapes when they reach adulthood. Nomura's jellyfish are also known as 'sea wasps' because they're capable of delivering venomous stings with their tentacles. These giant fishes have skinny flattened bellies with four rows of oral arms on either side of the mouth in five sections called 'rhopalia.' These arms contain stinging cells through which these animals catch food by swimming into it at high speeds! They are heavy and beautiful creatures. They have a bell with eight gross tentacles that extend from the bottom of their body, which they use to swim through waters by contracting or relaxing them in order to propel themselves forward while diffusing light around them as if it were an umbrella on land.

Lion's mane jellyfish in water

*Please note the main image and this image are of a Lion's Mane Jellyfish that belongs to the same class as the Nomura's Jellyfish. If you have an image of a Nomura's Jellyfish, please let us know at [email protected].

How cute are they?

Nomura's jellyfish happen to be among the only known species that make their own light through bioluminescence making them even more mesmerizing underwater than on land.

How do they communicate?

It is known that some China-based giant jellyfish have a unique ability to emit light like an anglerfish, but it was only recently discovered that this luminosity does not just serve as for attracting prey. In fact, scientists now believe they use these bioluminescent signals in order to communicate with each other and identify one another's species.

How big is a Nomura's jellyfish?

These Nomura Japanese sea giants typically range from 11-12 ft (3.3-3.6 m) in length and reside away from predators or any threat in the ocean near Japan, Hong Kong, Taiwan, Korea, and other areas in Asia where they are a problem fishing industry.

How fast can a Nomura's jellyfish move?

The fast-moving Nomura jellyfish of the seas can move up to 4.6 mph (7.4 kph), and they are also able to travel through the waters without any known predators.

How much does a Nomura's jellyfish weigh?

This Nomura sea fish is so massive that it's as heavy as 440 lb (199.5 kg).

What are the male and female names of the species?

There are no sex-specific terms, both males and females go by the name Nomura's jellyfish and are found in waters.

What would you call a baby Nomura's jellyfish?

These Japanese Nomura babies are referred to as Nomura's jellyfish babies or hatchlings! Nomura's jellyfish babies are so cute and adorable that they make you want to take a trip around the world to them just for one look.

What do they eat?

The largest China-based Nomura jellyfish is an uncommon creature. They feed primarily on zooplankton, a type of animal that makes up the bottom of many marine food chains.

Are they poisonous?

Nomura's jellyfish have long been considered a rare and exotic specimen. However, the creature is widely known for its toxin-filled sting which can be fatal to humans if they are stung more than once.

Would they make a good pet?

This Japanese jellyfish may be the largest and cute in appearance, but it turns out to be a difficult pet!

Did you know...

Scientists have long debated whether or not Nomura’s jellyfish is endemic to Japan. Recently, however, they discovered that this species can be found in other parts of Asia, China, and Northern Europe as well.

These Nomura jellyfish are a pelagic species that are preyed upon by numerous predators. They have evolved an interesting and peculiar body plan in order to avoid predation, but this does not always work out as some of these creatures still end up being eaten.

The deep, cobalt blue of the ocean during summer with these fishes is a sight to behold.

What is the deadliest jellyfish?

The deadliest jellyfish is the box jellyfish. The most common form of death by this creature occurs when it uses its tentacles to fire venom in its stings into a victim's bloodstream, which causes the prey's blood pressure and heart rate to drop dramatically leading them to fall unconscious within minutes before eventually dying from lack of oxygen.

Are all jellyfish immortal? 

It is a commonly held belief that all jellyfish are immortal. This isn’t necessarily true, however! Some marine biologists have shown through research and analysis how there are actually many different species of jellyfish with various lifespans.

Here at Kidadl, we have carefully created lots of interesting family-friendly animal facts for everyone to discover! Learn more about some other scyphozoans from our hydrozoan jellyfish facts and blue button jellyfish facts pages.

You can even occupy yourself at home by coloring one on our free printable Nomura's jellyfish coloring pages.

Written By
Iram Ashfaq

<p>With a Bachelor's degree in Dental Surgery from Shaney Institute of Health Sciences and a Master's degree in Public Health from Imperial College London, Iram is a highly qualified and accomplished writer from Srinagar, India. Over the course of a year, she has acquired multiple writing certifications, focusing on health sciences and research studies. Prior to joining Kidadl, Iram gained valuable experience working as a content writer for Indian firms and interning at a New York-based company. Her expertise and passion for writing shine through in her ability to create compelling content across a variety of topics.</p>

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