Yes. Without notice and without warning.
Yes. If you happen to see or run into a blue bottle jellyfish, you better swim away.
Humans have bones, jellyfish don't. Jellyfish are see through, humans aren't. Jellyfish will evaporate in the sun, humans won't. Jellyfish live under water, humans don't. Jellyfish have stinging tentacles, humans don't. Humans have different organs than jellyfish and allot more.
There is no answer to this. Jellyfish, as do humans, come in all different shapes and sizes.
The box jellyfish, which can be fatal to humans.
Yes; they can be.
Yes.
to eat
No.
yes
There are several types of jellyfish found in Australian waters, including the box jellyfish, the Irukandji jellyfish, the bluebottle jellyfish, and the moon jellyfish. Each of these jellyfish species has unique characteristics and can pose a threat to humans.
Humans will avoid these to prevent a painful sting. Humans also study them.
The Box Jellyfish