Umbrella-like creatures, with many tentacles, are popularly known as "jellyfish" or simply "jellies". In scientific system of classification, they are categorized under the kingdom Animalia, Phylum Cnidaria and sub-phylum Medusozoa. Other common names of these aquatic organisms include sea jellies and medusa (or plural medusae). Their tentacles are quite sticky, so that they can catch their prey quickly and easily. The prey gets stuck to their tentacles and it is hard for any victim to escape from them.

You can see jellyfish in every ocean. Basically, jellyfish is not a kind of fish; they are jellies instead, as they don't possess gills. They can easily survive on the top of the ocean as well as in the deeper regions. These fish are usually found in groups and their group is normally called a bloom or swarm.

Types of jellyfish

There are many types of jellyfish. Some are dangerous, while the others are absolutely harmless to other creatures and humans. It is still suggested that you should not consider all kinds of jelly fish to be safe to touch. A few types of jelly fish will be discussed in this article, such as cotylorhiza tuberculata. This type of jelly fish is harmless to humans and is mostly found in the Mediterranean Sea.

Other type of jelly fish is Marivagia Stellata, which is found on the Eastern side of the Mediterranean Sea but, on other places, it is quite rare.

Aequorea forskalea is a famous and lovely species of fish that is also harmless for human beings. Certain other types of jelly fish are Aurelia aurita, Catostylus tagi, Mnemiopsis leidyi, Phyllorhiza punctate, Rhopilema nomadica, Thalia democratica, Velella velella and Box jellyfish. Among all these types of jellyfish, the most dangerous and deadly ones include the box jellyfish. It is so dangerous that it can kill a number of human beings through its poison.

Facts about Jellyfish

Coming towards facts about jellyfish, there are many interesting pieces of information about these wonderful creatures.

  • The most surprising thing about these fish is that they are very old and were present on earth even when there were no dinosaurs. Isn't it amazing?
  • These organisms are increasing their population rapidly.
  • The most dangerous type is the box jellyfish that can cause death of a human being within three minutes.
  • The venom can kill almost sixty people at a time. Sounds scary, isn't it?
  • These marine animals are so strong that they can survive even in the deadliest zones of the ocean where any other creature cannot even enter.
  • As far as reproduction in jellyfish is concerned, they are capable of laying almost 45000 eggs per day!
  • They are capable of reproducing by both ways, that is, sexually and asexually.
  • The eggs of jellyfish, after passing through the stomach, get collected in the mouth.
  • Only those eggs get fertilized that get stuck to the mouth of mother Jellyfish.
  • One even stranger thing is that the jellyfish excrete through their mouth and they breathe via their skins.
  • The jellyfish doesn't possess any respiratory or central nervous system.
  • In fact, the network of nerves they have is present in the epidermis and is known as nerve net.
  • There is more than 90 percent of water in the jellyfish.
  • The umbrella like part contains the jelly-like substance in it, which is called mesoglea while the lower part of the body is known as the bell.
  • Apart from the deadliest ones, the largest jellyfish ever is the lion's mane jellyfish found in the Arctic Ocean.
  • This powerful creature gets disturbed when the rainfalls.
  • Since these creatures can only live well in salty water, therefore, in rainy season their population starts diminishing.
  • At least something is there that can scare jellyfishes too.

Pictures of jellyfish

You can find lots of jellyfish pictures on the internet and in a number of magazines. Just log on to the World Wide Web and download as many jellyfish pictures as you want. You can place the colorful pictures on your desktop screen, so that you can always get a look on them to refresh your mood. Their pictures would give a wonderful effect to your screen. You would feel as if a large number of colorful umbrellas are running down to your screen.

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