Very, they can sting you.
no
possibly, but i know Moon jellyfish and Up side down jellyfish are legal to have
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Ozone at ground level is harmful. It is useful in stratosphere as it protects us from harmful UV rays.
Trust me - Jellyfish are NOT playful to human swimmers
Jellyfish are neither friendly or aggressive. They have no way to tell a friend from a predator, so they do not sting you on purpose unless they are box jellyfish, which feel threatened by human populations.
No.
Box Jellyfish are not harmful to Turtles because turtles are not in jellyfishes main diet also turtle can't actually harm a turtle because of there hard shells. And their fast swimmers.
yes human eat jellyfish yes human eat jellyfish
A human nervous system is much more complex. Unlike a human a jellyfish does not have a central nervous system.
jellyfish do not eat human food.