It is said that one tentacle of a box jellyfish is enough to kill up to 30 full grown men!
the answer depends on the age, and physical health of the person in question. typically 2 to 3 minutes.
The box jelly fish has around about 60 tentacles, each one of them could kill up to 60 people from one sting.
and yes the box jelly fish is the only jelly fish that has a brain!
its 1621
They don't have arms and legs. They have tentacle's
No one knows the exact number of deaths caused by Box Jellyfish as many countries inhabited by them do not keep accurate records. The Philippines are believed to suffer 20 to 40 deaths a year because of Box Jellyfish. Australia's records have only 64 deaths in the past 129 years from Box Jellyfish. In Hawaii, I have found no records of a death attributed to Box Jellyfish.
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When there are too many at one place at a certain time, then yes, of course. Jellyfish "sting" people and too many jellyfish near the shore of a beach is bad news. This is why some beaches close at certain seasons (there are too many jellyfish)
The smallest deadliest jellyfish is the Malo Kingi Jellyfish which is a type of Irukandji Jellyfish. It inhabits the waters of Northern Australia and is no larger than an adults fingernail making them impossible to see in the water. There are two types of Irukandji Jellyfish the Malo Kingi and the Carukia Barnesi. If these jellies don't kill you they will at least leave you with a nasty case of Irukandji syndrome which results in such symptoms as headaches, nausea, restlessness, sweating, vomiting, high heart rate and blood pressure, not to mention severe back pains, muscle cramps, kidney pains and an intense skin burning sensation.
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Box jellyfish is actually a group of many species of jellyfish. Some are highly poisonous, others have a much weaker poison. The deadliest varieties can easily kill a human, while others may cause nothing more then itching for a few minutes. As for killing its predators, there are certain fish that have evolved defenses to the poisonous sting of box jellyfish making it so they can attack and eat the jellyfish without danger of being killed.
Approximately 20-50 people die worldwide each year from jellyfish stings. The severity of the sting, the species of jellyfish, and the individual's reaction to the venom can all affect the outcome of the encounter. It is important to seek medical attention immediately if stung by a jellyfish.
No; portuguese man o'war, or bluebottle jellyfish in not a jellyfish but a colony of many polyps.Each polyp is a single animal in the polypoid stadium (not medusoid), specialized in particular functions, and all together are joint to make a unique "body": the colony. The floating part is a polyp full of gas, called siphonophore; the "eating" part are polyps called gastrozoids; the stingy tentacles are the dactylozoids; while the reproductive sistem is provided by gonozoids.
jelly fish don't eat people
if they kill people all of them
a box of jellyfish A group of jellyfish is sometimes called a bloom or a swarm.