Jelly Fish


They come in all shapes, sizes and colors, and they can be found in almost every ocean in the world. Jellyfish! Where there is sea water, there are jellyfish ranging from warm tropical sea water to even cold polar waters.

 

 
Jellyfish belong to the large group of Cnidaria Cnidaria is one of the most common types of marine animals with more than 10,000 species. Other animals that belong to the Cnidaria family are sea anemones, sea fan corals, and hydras. although hydra in fresh water they are still relatives to jellyfish. The smallest jellyfish is the Irukandji with an adult size of about one centimeter is a living jellyfish and one of the most venomous in the world!.

 

The largest jellyfish, is the lion's mane jellyfish which can reach a size of 7 feet or 2.3 meters with 121 feet or 37 meters long tentacles. Wow! big! Jellyfish are invertebrates That means they have no backbone in fact, jellyfish have no bones at all!.

 

They also don't have eyes, ears, a heart, or a brain. Wait a minute.. wait. Then how can Jellyfish live without a heart or brain? Although jellyfish do not have or central nervous system they have a basic neural brain on the surface of their tentacles. These nerves detect touch temperature, salinity, etc.

 

Therefore jellyfish reflexively respond to these stimuli because they have no brain they live passively completely relying on their automatic reflexes. They sense light and direct themselves toward it by feeling it through the light-sensitive cells along their backs.

 

With these sensors they can also feel in the air and maintain their balance. Because they are also limited and do not have full guarantee of ocean currents to be able to move around the habitat. They catch prey is also a matter of chance as jellyfish have no brain they cannot actively pursue their food so jellyfish just wait for their prey to get caught in their venomous tentacles Then eat it. Then, how can jellyfish live without a heart? The main function of the whole is throughout the blood to the body throughout the body so that the body's cells can obtain oxygen and nutrients from the blood and remove unnecessary substances such as carbon dioxide. Well, what's special about jellyfish anatomy is the outer layer of the body. they are known as Ectoderm They are only a few cells thick so oxygen can easily diffuse into the jellyfish's body.

 

Jellyfish also have a very simple digestive system in which simple nutrients are distributed throughout the body. The process of diffusion of oxygen and nutrients does not require a strong pump like the heart to be able to permeate throughout the body. this is the greatness of the simplicity of jellyfish anatomy Apart from relying on ocean currents Jellyfish can swim but in a unique way Jellyfish use a simple jet propulsion motion to swim they open their bodies like umbrellas and then close them By closing their bodies, the water inside is forced come out and the jellyfish can move forward This way the jellyfish can move where they want.Keeping moving is the only way to keep the jellyfish afloat but no matter how much effort and effort they make They can easily be carried away by strong winds or ocean currents that are the main cause of jellyfish stranded on the beach

 

The top of the jellyfish is called a bell and their jelly-like body is made almost entirely of air. Some jellyfish have winged tentacles and some have long plain tentacles. Scientists have a theory that jellyfish have existed on earth since before the dinosaurs, some jellyfish only live a few months while others can live to be more than 30 years.

 

Until this web was created, there are more than 200 known species of jellyfish in the ocean. As previously discussed some jellyfish have light sensors that look like eye spots that can sense sunlight and help the jellyfish know which way to go up. jellyfish are bioluminescent which means that they can produce light from their bodies like fireflies or even like disco lights ~i know, bad joke

 

Although no one knows for sure why they flare up scientists believe it is a defense mechanism to surprise predators or perhaps to attract other predators to attack each other. Jellyfish bodies are mostly transparent or see-through. This makes them difficult to see inside. water that helps them hide from predators who want to eat them The main predators of jellyfish are turtle sharks, swordfish and even fellow jellyfish.

 

Jellyfish themselves are carnivores but do not actively pursue them. They passively wait for fish or other small animals to become trapped in their tentacles. The tentacles cover the stinging cells that can explode and inject poison into their prey and then paralyze it.
Jellyfish are also often reported to sting humans some jellyfish stings only irritate or even lightly injure However, some types of jellyfish such as the box jellyfish species can provide a sting that can kill instantly. Jellyfish have a complex life cycle and interesting. Usually, they start out as eggs floating in ocean currents. Each egg will then develop into a planula, a larva that can swim. Then, after a few days the planula will find something sturdy to anchor and transform into a polyp. This polyp looks a bit like a polyp flower. It survives by using its tentacles to catch and eat zooplankton. Then finally the polyps begin to grow and divide into ephyra or immature jellyfish which then develop into the medusa form that we usually know as jellyfish. Despite all the time it takes to become an adult, an adult jellyfish usually only lives to about a year.

 

Unique and beautiful jellyfish may seem like a calm and peaceful sea creature Although some types of jellyfish are harmless and we can observe them at close range some of them have deadly tentacles some of them are dangerous predators which can prove to be painful or even deadly to humans. those who dare to approach I hope you enjoy this website about jellyfish. See you on the next web.