JellyFish Facts

Clear Jellyfish

Clear Jellyfish picture

Clear Jellyfish

The jellyfish is a strange and fascinating marine animal that is found in all the oceans of the world. What makes it fascinating is the fact that it does not have a solid skeletal structure, or a brain, or a heart. The bell or umbrella shaped body of the jellyfish is filled with a gelatinous substance which is 95% water. The jelly substance is supported by muscle fibres that are intertwined in the body itself. On the underside of its, is its mouth, which is connected directly to its stomach, which is just a cavity. The stomach is the only opening in its body and the food is ingested there and the waste also comes out from there only. Some jellyfish use the stomach as a swimming mechanism, by filling it with water and then pumping it out, to propel them.

Due to the jelly-like substance and the fact that it is 95% water, the jellyfish has a clear or transparent appearance. Jellyfish do have different colors, but that there are many who are clear in appearance and very hard to detect in water. There are 200 different types of jellyfish and some are totally clear, while some are clear and their insides have color or a fluorescent light, that glows.

The most commonly found jellyfish in the sea is the Aurelia aurita or the moon jellyfish. This is a clear jellyfish and has exquisite coloration of spots or streaks on the upper side of the body. It is between 5 to 40 centimeters wide. The coronal muscle allows it to pulsate its bell-shaped upper part, so that it can move in the water. The impulse to contract, is sent via a nerve network in the body. This jellyfish swims horizontally, and it tries to keep itself at the surface of the water. It spreads its tentacles as widely as possible, to capture its prey. This carnivorous jellyfish mainly feeds on small plankton organisms like mollusks, crustaceans, tunicate larvae, copepods, rotifers, nematodes and protozoans. They are also known to eat small hydromedusae and ctenophores.

The habitat of the moon jellyfish is mostly in the Atlantic, Pacific and the Indian Ocean. They are found mostly near the coastal areas in the warm and tropical waters. They are known to withstand even very cold temperatures of up to -6 degrees Centigrade. The salinity of the water determines the curvature of its bell body. More the salinity of the water, more is the curvature.

Although totally clear, this jellyfish has conspicuous coloration on its gonads, which lie near the bottom of its stomach. They sexually mature in spring and summer, and are distinguishable as male and female. They reproduce sexually and later asexually by budding.

Another clear jellyfish is the comb jellyfish, and contain 98% water. They are transparent and almost invisible. This jellyfish is a predator, and catches crustaceans in its sticky tentacles. It has a powerful capability of healing itself, and its regenerative powers can repair 50% of its body. It is highly concentrated in the Caspian and Baltic seas.

Learn more about Jellyfish, different Jellyfish Species, general Jellyfish Information, Jellyfish Pets and Jellyfish Safety

Written by and Sudarsana Sinha.

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