Interesting facts about jellyfish
Jellyfish have appeared in the oceans for over 650 million years ago, even before dinosaurs appeared on Earth. Jellyfish are found throughout the world's oceans. Even they are also found in some freshwater lakes and ponds.Jellyfish not have brain, heart, ears, head, or bone. Their skin is so thin that they can breathing pass it. About 95% of jellyfish it is water.So if they are out of water, they will wither away and then die. The body of the jellyfish the size of a finger, or just a part of a pencil eraser. But there are jellyfish have a trunk diameter of up to 2.5 m, its tentacles can be up to 60m, equivalent to the size of two blue whales.Each jellyfish tentacle is composed of thousands of cells called cnidoblasts. Inside each cnidoblasts is the nematocysts. Each nematocysts contain a spiral feathers like a needle containing venom. When a prey trapped in the tentacles of the jellyfish, the pressure nematocysts inside will make the needle is twisted and stretched like a fishhook. Prey will be injected poison into the people who have suffered from the "hook" is. Jellyfish tentacles can still inject poison even when it is cut off its body.The main defense mechanism of jellyfish will inject poison into the enemy and its transparent body makes it easy to hide in the ocean.Jellyfish also have a part like a short pipe between the body like hanging bell of it. The "tube" acts like the mouth and digestive organs. In some species of jellyfish, the "tube" is surrounded by a fringe pieces like a twisted ribbon in water. Their are also known as arm-mouth or weapons-mouth. Jellyfish do not have brains, but they have a nervous system special capable of detecting light, vibration and chemicals in the water. These capabilities, along with the feeling of gravity jellyfish can help orient and move in the water with ease.Jellyfish reproduce by mating and asexual reproduction. Jellyfish female and jellyfish males are clearly distinguished, although also found some jellyfish bisexual.The lifespan of jellyfish just hours or up to several months. However, there is a species of jellyfish has been recorded that can live up to 30 years. Jellyfish live in the aquarium artificial life are often have lifespan higher than jellyfish live in the wild.Jellyfish are carnivorous animals. They feed on crustaceans, plankton, fish eggs, and small fish or even other jellyfish. They eat through the mouth pipe between their bodies.Jellyfish are also prey of some predator species such as sharks, tuna, swordfish, sea turtles and several species of Pacific salmon.When a jellyfish upside down, it does not float in water. Instead, it hang himself on the ocean floor. Then they looks like the seaweed plant.Currently scientists had recorded 2,000 different species of jellyfish. Of these have 70 species can cause damage to humans. In that "chironex fleckeri" is the most dangerous species. Scientists believe that there may be 300,000 different species of jellyfish not yet to be discovered.Jellyfish move in two basic ways. they use the water in their body and push it to move , creating jet to move forward. In addition, they also move by drift with ocean currents.Because environmental pressures may increase jellyfish swarms. Jellyfish is one of the few species can adapted to live and in the dead ocean or places with little oxygen or contaminated. There are more than 400 dead ocean worldwide.
Many scientists believe that the change of environment, climate change, pollution and over fish so much has led to an increase in the number of this species.In some parts of the world, there is dish jellyfish. Hundreds of tons of jellyfish are consumed each year for $15/1 pound. Jellyfish species often used to eat is Cannonball.Jellyfish also be exploited to take collagen, they are used in many different purposes, including the treatment of rheumatoid arthritis.Each year, the number of human deaths caused by jellyfish even more than the death caused by shark attacks.A scientific advisor to the UK government predicted that extraterrestrial creatures shaped like giant jellyfish, if they really exist.
The reason why i choose this because jellyfish is so interesting and kind of soft. There are several types that glow very nice looking, eat delicious while I've never eaten. Besides, jellyfish is also a species dangerous.
Many scientists believe that the change of environment, climate change, pollution and over fish so much has led to an increase in the number of this species.In some parts of the world, there is dish jellyfish. Hundreds of tons of jellyfish are consumed each year for $15/1 pound. Jellyfish species often used to eat is Cannonball.Jellyfish also be exploited to take collagen, they are used in many different purposes, including the treatment of rheumatoid arthritis.Each year, the number of human deaths caused by jellyfish even more than the death caused by shark attacks.A scientific advisor to the UK government predicted that extraterrestrial creatures shaped like giant jellyfish, if they really exist.
The reason why i choose this because jellyfish is so interesting and kind of soft. There are several types that glow very nice looking, eat delicious while I've never eaten. Besides, jellyfish is also a species dangerous.