the box jellyfish/sea wasp : one of the most lethal fish by thibaut dubédat [email protected]
TRANSCRIPT
The creature :
This creature of 2 kg is : gelatinouswith 60 tentacles which can reach a length of 3 m
One tentacle contains 5000 stinging cells called nematocysts, which produce one of the fastest working toxins .
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Feature of Sea wasp
• Tentacles are covered in a high density of nematocysts
• Sting causes excruciating pain and can kill in as little as 3 minutes
• Amount of venom in one animal is enough to kill 60 adult humans
• Is believed to be the most venomous creature in the world
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The diet, predator of Sea wasp
• Live on a diet of prawns and small fish • Preyed on by turtles, which are the only
creatures known to be immune to their stings
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Shape of a box Jellyfish : • Box Jellyfish are pale blue and transparent, • and bell or cubed shaped with four distinct sides,
therefore its name : box jellyfish.• the average size at sexual maturity is 20 to 30 cm in
bell diameter
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Injuries inflected by a box jellyfish• No chance of surviving to the venomous sting,
unless treated immediately. • The pain is so excruciating and overwhelming that
you would most likely go into shock and drown before reaching the shore.
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• Umbrella shape• Tentacles around mouth• Mobile, Free-swimming
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A box jellyfish is a medusa
The body of a Sea Wasp She has :• nematocysts (like little harpoons) in their
tentacles to catch food and for defense. • Simple muscles and nerves but no brain• But a a noncentralized nerve net (to be able to
detect and respond…)
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The tentacles of a medusa
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• Have nematocysts
(stinging cells)• Coiled thread
discharges like a harpoon• Contains
neurotoxin• Paralyzes prey Discharged
nematocyst
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To resume : the different parts of a jellyfish
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General things about box Jellyfish
• Highest risk period for the box jellyfish is between October to May
• Abundant in the warm waters of northern Australia and Indo-Pacific
• Global warming is allowing them to inhabit new areas!
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