Box jellyfish, found off the coast of Australia, have an intense venom produced by bacteria that can kill humans within minutes. Their venom attacks the heart, nervous system and skin cells, causing severe pain, shock or heart attack. More than 5000 people have died from box jellyfish stings in Australia since the 20th century. They have 24 eyes, 15 foot long tentacles containing millions of venom capsules that can fire upon contact with chemicals on surfaces.

1. Box Jellyfish - About toxicity
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École des Mines de Saint-Étienne
Graduate School of Life Science and System Engineering,
Laboratory of biofunctional Materials
Kyushu Institute of Technology
Yasuyuki Kuramoto
e-mail:yasuyuki.kuramoto@etu.emse.fr

2. • More than 5000 people have been killed by kind of box jellyfish
(Chironex fleckeri)who lives in Australia since 20th century.
Introduction
Box jellyfish
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Habit
・ The medusa form of a box jellyfish has a squarish, box-
like bell.
・ From each of the four lower corners of this hangs a
short pedalium or stalk which bears one or more long,
slender, hollow tentacles.
・Box jellyfish to killing or stunned instantly prey such as
small shrimp, with its intense poison. Sometimes they
also use for self-defense.

3. • Box jellyfish has a poison produced by the bacteria.
toxicity
Botulinum toxin
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Botulinum toxin A
・ The cause of botulinum food poisoning, very toxic
・ If the type A toxin to humans was orally
administered, lethal dose per body weight 1kg is
estimated to 1μg.
・ Because the toxicity is eliminated and deactivated
when treated with either alkali heating at 100 ℃ 10
minutes, it is safe if enough heating
Characteristic

4. Habitat&Characteristic
box jellyfish range
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The box jellyfish is found off the
north and northeast coast of
Australia.
Box jellyfish live for only a couple of months
They feed on small fish and shrimp and can double in
size in one month.
Box jellyfish have 24 eyes clusters on each
corner of its box shape, giving it 360 degree
vision both horizontally and vertically.
Box jellyfish tentacles are 15
feet long and a quarter inch
thick
A single tentacle contains millions
of venom capsules that fire with
a mechanical trigger stimulated
by chemicals on the surface

5. Accident
Box jellyfish warning sign in Australia
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the box jellyfish has been called "the world's most venomous creature"
Toxin attacks our heart and nervous system, and the skin
cells,
When the human is bitten by box jellyfish, become a
shock for stand about not of severe pain or indulgences.
Which it will die in a heart attack before you get to the
shore. Death severe pain continued for several weeks
without lead, often terrible scar remains in the part of
tentacles touches.
Symptoms of skin of
the person who bites
Box jellyfish