About Jellyfish
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JELLYFISH
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Scientific Clasification
Kingdom : Animalia
Phylum : Cnidaria
Subphylum: Medusozoa
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CLASSES
Hydrozoa Scyphozoa
Cubozoa Staurozoa
Pol odiozoa
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Jellyfish (also
known as
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Jellyfish are found in every ocean,
from the surface to the deep sea. Somehydrozoan jellyfish, or hydromedusae, are
also found in fresh water; freshwater
species are less than an inch (25 mm) indiameter, 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.
http://en.wikipedia.org/wiki/Aurelia_%28genus%29http://en.wikipedia.org/wiki/Aurelia_%28genus%29 -
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TERMINOLOGY
Since jellyfish are not actually fish,
the word jellyfish is considered by some
to be a misnomer, and American publicaquariums have popularized use of the
terms jellies or sea jellies instead.
Others find jellyfish (which has been incommon usage for more than a century)
to be equally useful and picturesque, and
refer it over ellies. The word ell fish
http://en.wikipedia.org/wiki/Fishhttp://en.wikipedia.org/wiki/Misnomerhttp://en.wikipedia.org/wiki/Misnomerhttp://en.wikipedia.org/wiki/Fish -
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ANATOMY
A jellyfish does not have a
brain or central
nervous system, but rather has
a loose network of nerves,
located in the epidermis, which
is called a "nerve net". A
ell fish detects various
http://en.wikipedia.org/wiki/Nervous_systemhttp://en.wikipedia.org/wiki/Squamous_epitheliumhttp://en.wikipedia.org/wiki/Nerve_nethttp://en.wikipedia.org/wiki/Nerve_nethttp://en.wikipedia.org/wiki/Squamous_epitheliumhttp://en.wikipedia.org/wiki/Nervous_system -
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IMPORTANCE TOHUMANS
Onlyscyphozoan
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TOXICITY TO HUMANSAll jellyfish sting their prey using nematocysts, also called cnidocysts,
stinging structures located in specialized cells called cnidocytes, which arecharacteristic of all Cnidaria. Contact with a jellyfish tentacle can trigger
millions of nematocysts to pierce the skin and inject venom, yet the sting
of only some jellyfish species causes an adverse reaction in humans. When
a nematocyst is triggered by contact by predator or prey, pressure builds
up rapidly inside it up to 2,000 lbs/sq. inch until it bursts open. A lanceinside the nematocyst pierces the victim's skin, and poison flows through
into the victim. Touching or being touched by a jellyfish can be very
uncomfortable, sometimes requiring medical assistance; sting effects
range from no effect to extreme pain to death. Because of the wide
variation in response to jellyfish stings, it is wisest not to contact anyjellyfish with bare skin. Even beached and dying jellyfish can still sting
http://en.wikipedia.org/wiki/Nematocysthttp://en.wikipedia.org/wiki/Cnidocyteshttp://en.wikipedia.org/wiki/Cnidariahttp://en.wikipedia.org/wiki/Cnidariahttp://en.wikipedia.org/wiki/Cnidocyteshttp://en.wikipedia.org/wiki/Nematocyst -
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TREATMENTThe three goals of first aid for
uncomplicated jellyfish stingsinvolve preventing injury torescuers, deactivating thenematocysts, and removingtentacles attached to the patient.Rescuers should wear barrierclothing, such as panty hose, wet
suits or full-body sting-proof suits.
http://en.wikipedia.org/wiki/Cnidocytehttp://en.wikipedia.org/wiki/Panty_hosehttp://en.wikipedia.org/wiki/Panty_hosehttp://en.wikipedia.org/wiki/Cnidocyte -
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SOME PICTURE OF
JELLYFISH
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I THINK THATS ALL..
THANK YOU..