as long as they want
who or wat is polyp a polyp stays alive by staying in its vase shape dome then it will turn into a (Medusa) grone-up jellyfish :)
For never.
6 months at the most
they release eggs and sperm into the water. once eggs hatch they attach themselves to rocks or corral reef, depending on the location and species of jellyfish. This is a period in the life cycle called 'polyp'. they are usually immobile and stay attached until more fully developed. Again this is all depending on the species so it can varry.
You can not get rid of jellyfish, they have been in the ocean forever. They are here to stay.
9-10 days. Like clockwork.
not very long you can find that a box jelly fish can survive up to one and a half hours
Cnidarians live in an aquatic habitat where they stay their whole lives. Cnidarians also have two forms in its life cycle, the polyp is the first stage. This is like a sea anemone, basically it is anchored to the ground and must wait till it matures before evolving into its medusa form, which is like a jellyfish. Some polyp's have developed the ability to move from where they are anchored though, but it is unusual. Polyp and Medusa are found in mostly all waters, the water currents in the oceans have made it possible for them to inhabit all areas in todays oceans. There are also many different types of cnidarians.
Some are, some aren't. Best to stay away.
No. They move about the ocean.
Stay away from them. If you have to be among them, wear protective clothing.
It depends on the Jellyfish, if it's a baby or if it's small about twenty minutes not long. If it's a big adult... you may need to go to the hospital because of their poison or it could be no big deal and it would last about a hour. Warning! The size doesn't always count! Becareful and safe! Hopes this helps!