Jellyfish Facts

Jellyfish are beautiful deep sea animals from the Cnidaria family. Jellyfish can be considered both deadly and helpful. Read through to know some facts like these about jellyfish.
| Thursday, October 02, 2008

Jellyfish are beautiful deep sea animals from the Cnidaria family. Although primary population of jellyfish lies in deep sea, some species of jellyfish can be found in fresh  water sources as well. Some jellyfish (especially from the Cubozoa class), with their stings, can be very lethal to humans. Read on to know some quick jellyfish facts.

Interesting Facts About Jellyfish

  • Most of the jellyfish are found in deep oceans but some such as the hydrozoan jellyfish can also be found in fresh water.
  • Most jellyfish comes in different sizes, colors and shapes; they are mostly colorful animals while some can be translucent as well.
  • All types of jellyfish aren't poisonous but nevertheless the sting of all jellyfish can be very painful. Among the most poisonous jellyfish, the ones from the Cubozoa class (box  jellyfish) are considered to be extremely lethal.
  • Jellyfish does not possess brains but rather an elementary nervous system, also called nerve net which is located in its epidermis. Jellyfish identifies touch from other  animals using this very nervous system they possess. Jellyfish are very fragile and contain not more than 5% of solid organic matter.
  • Jellyfish endow pulsating rhythm to move vertically but they largely depend on oceanic currents, winds and tides for horizontal movement.
  • Jellyfish can thrive in water with less oxygen levels. This fact can be attributed somehow to the rising population of jellyfish. The northern Gulf of Mexico has been witnessing severe rise in jellyfish blooms since the past few years.
  • Primarily the tuna fish, sharks and swordfish prey on jellyfish although some other jellyfishes, too, can be the predators.
  • The sting of jellyfish can result in anaphylaxis in humans and can cause death. Upon, receiving stings from the jellyfish, urgent and immediate medical help should be sought.
  • Jellyfish are capable of reproducing both sexually and asexually. The life cycle of jellyfish is quite complex and the animal passes through different forms before attaining maturity.
  • Many Asian countries and primarily Chinese people consider jellyfish from the scyphozoan class as an importance source of food. Further more, the toxins in these fishes  aren't injurious or harmful to humans.
  • The green fluorescent protein in jellyfish has become very important in biology researches. They are known to be extremely helpful in treatment of rheumatoid arthritis with  the use of their collagen.
  • Some common jellyfish types include Cannonball Jelly (Stomolophus meleagris), Southern Moon Jelly (Aurelia marginalis),  Lion’s Mane (Cyanea capillata), Sea Nettle  (Chrysaora quinquecirrha), Mushroom Jelly (Rhopilema verrilli), Portuguese Man-of-War (Physalia physalis) and Sea Wasp (Chiropsalmus quadrumanus).
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