Yes for a food source and diff types of things
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no there are other kinds of jellyfish that can kill humans like the Irukandji.
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.
Jellyfish can be found off of Oahu, although they aren't a big problem. As far as I'm aware, there are no jellyfish there that can kill humans. Though the are Box Jellyfish there, they aren't the notorious killers that are found in other parts of the world.
yes human eat jellyfish yes human eat jellyfish
It depends on the species of jellyfish. The irukandji jellyfish has the potential to kill a person in 2 minutes.
There is no answer to this. Jellyfish, as do humans, come in all different shapes and sizes.
No. A sea anemone and a jellyfish would not meet. If they did meet, the jellyfish would sting the sea anemone and kill it.
No.
Yes a lion mane jellyfish can kill octopus. Because the octopus can not take the rage and power that the jellyfish is providing.
The box jellyfish, which can be fatal to humans.