3 Feb 2016

25 Amazing Jellyfish Facts for Kids and Grown Ups

amazing jellyfish

Fun Facts About Jellyfish

Jellyfish is the oldest multi-cellular organism. They are swimming in the oceans and the seas of the world for more than 700 million years. They can be found in every ocean. A jellyfish floats near the surface as well as in the deepest parts of the ocean.

A well known Jellyfish fact is that they mostly live in salt waters. There body has two main parts – a bell and some tentacles. Some of the jellies have very poisonous stings in their tentacles. You can learn some really surprising facts about jellyfish by reading this article. 

I know you know many things about jellies. Some of these facts are well known to you. But I hope that I can also surprise you with some info which is new to you.

Here is a video about interesting Jellyfish facts.

There are immortal Jellyfishes!

Yes, it is true that one kind of Jellyfish can live forever. The scientific name of the species is Turritopsis nutricula. It can reverse its age, how convenient!

The Jellyfish has two stages in life, the Polyp or baby fish and the Medusa or adult phase. The above mentioned Jellyfish can reverse its ageing cycle to again become a Polyp. How do you like to be back to the childhood?

In this way, the creature can defeat time by forwarding and reversing its age. But it is no God. So, it is not 100% immortal. It can die from outside hazards.

A Jellyfish is a brainless creature!

There is no brain inside a Jellyfish. It cannot think. It has only some simple nerve sets to detect the atmosphere around it’s and to function its body parts properly.

The Movement of a Jellyfish could be used in a future flying machine!

Yes, it is true. Some researchers have found that the propulsion system of Jellyfish in water can be successfully used in air too to propel a flying machine.

A Jellyfish can be roll model to submarine robots!

The propulsion system of a jellyfish in water is very efficient. Future underwater robots may follow this technique. In fact, some prototypes have been developed to mimic jellyfish movement.

Jellyfish can be eaten as powders!

Most people do not eat jellyfish. But some experts are working on making them edible and fit to everybody’s consumption. A jellyfish powder has been developed to use as a food item.

90% of Jellyfish is water!

An interesting fact about Jellyfish is that it is full of water. The body is like a water balloon. There is a gelatin like material named mesoglea inside the umbrella which is covered by a outer layer and an inner layer.

Jellyfish egg fertilization takes place in outside water!

The female jelly releases the unfertilized eggs in the water. A male also distribute sperms in the water near the eggs. The sperms swim to the eggs and the fertilization takes place.

A Jellyfish can be very poisonous!

We know that the tentacles of a jellyfish are poisonous. If you touch it, you could be in trouble. The venom of a box jellyfish is the most deadly. It can cause human death. Many people have died from its poisonous tentacle’s death touches.

Jellyfish can be very big!

giant jellyfish facts
Giant Jellyfish
 We know that jellyfish is a small animal. But there are some jellies which are huge in size. Nomura’s Jellyfish is such a giant. It can be very big with 6ft 7 inches bell size and 440lb weight. It can be seen in the seas around Japan, Korea and China. The lion’s mane jelly is also a giant. Its tentacle length can be 120 ft long. Stygiomedusa gigantic is another mega jellyfish which is an inhabitant of deep seas. Learn more about largest jellyfish on earth.

A Jellyfish can also be microscopic !

There is a jellyfish named “Creeping Jellyfish” which is as small as 0.5mm only. It cannot be seen by our eyes. So, we need to use a microscope to see it. Another very small, barely visible Jellyfish is hydromedusae, which have a 1mm size bell.

Some Jellyfish can live in rivers !

We all know that Jellyfish is a salt water animal. We can found them in every ocean and sea of the world. But there are also some river dweller species of it, too.

Some Jellies can glow !

glowing jelly

Bioluminescence can be seen in some jelly species. These creatures can emit light from their body. Comb jellies are known for these phenomena. Crystal Jelly or Aequorea Victoria is a hydrogen jellyfish (hydromedusa). It is the most famous bio light emitting jellyfish.

A  Jellyfish can clone itself!

A jellyfish can clone a copy of itself. It can create hundreds of clones which are genetically same. In this way, if one jelly gets hurt then he produces clones to live forever.

A bloom can contains millions of Jellies!

The swarm of Jellies is called as “bloom”. In a bloom millions of them can swim together. A big bloom can cover hundreds of square miles of the sea. Appearance of a large bloom can create havoc in fisheries and tourism.

A jellyfish fire stings faster than a bullet!

When some people or fish touches the tentacle of a Jellyfish it fires the stings. The sting is thrown to the target at a very high speed. It is even faster than the bullet of a gun. Watch the video to know how they sting.

Box Jellyfish can be faster than you!

A box jellyfish is capable of reaching a speed of 4 knots. So, you will not be able to defeat it in a swimming competition. These jellies are very poisonous and they haunt small fishes too. They are active haunters. People call them as “sea wasps”.

Jellyfish does not have lungs!

Facts about Jellyfish

A jellyfish does not have respirator organs like lungs or gills. They exchange gases with water by using their skin. There thin is well suited for oxygen diffusion.

Jellies have no left or right side!

Another interesting Jellyfish information is their body is totally symmetrical in design. They have no left or right sides. There body only have upper and lower parts. So, if you split it vertically, you will get two identical pieces.

Jellyfish is not a fish!

There is no relationship between a fish and a Jellyfish. They are actually plankton. That is why many people do not like the suffix “fish” with its name. They prefer to call them only Jellies. Actually, the term "fish" came to use a long time ago when people do not have any scientific definition of what is fish and what is not.

Future medical devices can use jellyfish protein!

We have read about the glowing Jellyfish. Well, it has a special protein which generates that light. Researchers are trying to use this protein to make sophisticated medical equipment by using that protein. Two such photoproteins are aequorin and green fluorescent protein (GFP).

There is a Jellyfish Lake !

There is a lake full of jellies. It is situated in a small island of Palau, in the Pacific Ocean. The lake has saline sea water comes from the ocean during the high tides. Thousands of tourists come every year to drive with thousands of golden colored jellyfishes. These are also completely harmless to people. Watch the video to know more about it:

They can rule the sea in the near future!

The change in the environmental conditions of the sea can be very beneficial to jellyfish growth. The global worming and water pollution have already a great impact on the increment of their population. It is a matter of concern with the learned men.

jellyfish information

There is a Jellyfish Named Portuguese Man o’ War!

To be precise, the man of war is not actually a true jellyfish. It is not a single animal. It is a colony of minute animals called “zooids”. These zooids cannot survive alone.  The man of war has everything like a true jellyfish; the bell, tentacles and the sting!

Jellies can Survive in Dead Zones

Due to some natural or man made reasons dead zones are created in the oceans. These are the areas with extremely low concentration of dissolved oxygen in the water. Due to the scarcity of oxygen, the marine animals can not survive their for long. But Jellyfishes can adapt in such harsh environments. Often one can find only jellyfishes as the only big animals in marine dead zones.

Baby Moon Jellies


Sharks can't Eat Jellies

We know sharks eats everything, right? Some sharks even swallow food tin boxes or piece of wood thrown away from ships. But such voracious eaters also avoid jellies. It is too difficult to eat one without getting the taste of a poisonous sting. That is why most predators avoid them.

Jelly Taxi

Some species of small crabs and shrimps often get free ride on top of a jellyfish. They use jellies as their submarine vehicle to go to one place to another. In the way, they also share the food source of their ride. The hard exo-skeleton of these crustaceans protect them from the stings.

crab riding jellyfish
Crab riding  a jellyfish

Some Turtles Eat Jellyfishes

While most other marine carnivores avoid them for nasty stings, some turtles eat jellyfish. Leatherback Turtle's one of the main food source is jellies. Other Turtles like Olive Ridley and Kemp's Ridley also love to have some jelly dinners. Actually, the thick skin of the turtle's protect them from the dreaded stings.

Look at the video about a Turtle feeds himself with some jellyfishes.

I hope that you will like these interesting jellyfish facts. Do you have some more in your stock. If yes, then feel free to share it with us via commenting. If you like to read more, please check this article moon jellyfish sting treatment. Also let us know about your opinion regarding this post.

Check this article: What do Jellyfish Eat