Cyphozoan (a type of jellyfish) is the only jellyfish harvested for food. Also some species of jellyfish can be used in biotechnology where scientists experiment with the genes from jellyfish e.g GFP (green fluorescent protein) which can be inserted into the cells of other organisms.
I'm not so sure, but in some parts of Asia they eat certain types of jellyfish as snacks
Jellyfish
octupuss
Jellyfish are abundant in many parts of the ocean.I do not like seeing jellyfish on the beach.A jellyfish stung me as I was swimming in the Mediterranean Sea this summer.
Mouth
Jellyfish can be found in many parts of the world as the can live in seawater and freshwater. Jellyfish are in the waters of Hawaii, California, France, Africa and Australia.
spongebob uses a net for his jellyfish
Jellyfish live in both the shallow waters of the ocean and the deep parts of the ocean. They can live in warm or cold water.
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.
The tenticals!
No, they lack the body parts needed to preform that function.
Jellyfish uses it's stinger to stun or kill fish. After it stuns them it eats them. Some Stingers can be over 50ft long!