Jellyfish Facts

Amazing photos of Jellyfish from all over the world.

Jellyfish Facts…

  • In the Artic Sea, the North Atlantic Sea and Northern Pacific Ocean lives a Jellyfish that can grow to over 120 feet long? It is the Lion’s Mane Jellyfish, the largest known Jellyfish in the world. Learn more about the Lion’s Mane Jellyfish.
  • In countries like Japan, Korea and China, it is considered a delicacy to eat Jellyfish, you can try it too! Learn more about Eating Jellyfish.
  • Some Jellyfish have immortal properties. The turritopsis nutriculajellyfish is one of the most unique animals not just within the species of jellyfish, but within the entire history of the animal kingdom. It appears to have cheated death and hence transformed itself into a perpetually immortal being! Learn more about the Immortal Jellyfish.
  • The most poisonous species of jellyfish is the Irukandji Jellyfish. Upon a string, the victim will suffer what is know as Irukandji syndrome which including nausea, vomiting, cramps, high blood pressure, severe pain, and sometimes death. Learn more about the Irukandji Jellyfish.
  • In the past, you could only view Jellyfish in the wild or your favoriate Aquarium. It is now possible to keep Jellyfish at home, as pets. Read more about Jellyfish Pets.

Jellyfish (also known as jellies or sea jellies or Medusozoa) are free-swimming members of the phylum Cnidaria. Jellyfish have several different morphologies that represent several different cnidarian classes including the Scyphozoa (over 200 species), Staurozoa (about 50 species), Cubozoa (about 20 species), and Hydrozoa (about 1000–1500 species that make jellyfish and many more that do not). The jellyfish in these groups are also called, respectively, scyphomedusae, stauromedusae, cubomedusae, and hydromedusae. All jellyfish are embodied in the Medusozoa subphylum. Medusa is another word for jellyfish, and refers specifically to adult jellyfish. The collective name for a group of jellyfish is a smack.

Jellyfish are found in every ocean, from the surface to the deep sea. Some hydrozoan jellyfish, or hydromedusae, are also found in fresh water; freshwater species are less than an inch (25 mm) in diameter, are colorless and do not sting. Many of the best-known jellyfish, such as Aurelia, are scyphomedusae. These are the large, often colorful, jellyfish that are common in coastal zones worldwide.

In its broadest sense, the term jellyfish also generally refers to members of the phylum Ctenophora. Although not closely related to cnidarian jellyfish, ctenophores are also free-swimming planktonic carnivores, are generally transparent or translucent, and exist in shallow to deep portions of all the world’s oceans.

Lion’s Mane Jellyfish are the largest known jellyfish, and arguably the longest animal in the world, with tentacles up to 36.5 m (120 feet) long.

Comments (1)

  • steve
    January 18, 2011 at 3:25 pm

    Awesome pics!

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