The simple answer: some do, as they migrate. Some basically sit there as a huge blob.
they swim as long as they can
swim
jellyfish swim in the sea
yes
A group of jellyfish is sometimes called a bloom or a swarm.
yes there can
yes
they swim all ways..their is not forward backwards or sideways....
Usually none. Jellyfish can't survive in ponds.......
swim and sting!!
yes
Jellyfish swim by contracting and relaxing their bell-shaped bodies, pushing water behind them to propel themselves forward. This movement is called pulsing, and allows jellyfish to move through the ocean.