They flap their testicles around until they come up with an image
No. Jellyfish do not have eyes, so they cannot "see."
Yes, most species of jellyfish are visible to the naked eye.
Yes! See this site for lots & lots of phtos of jellyfish. http://www.imagequest3d.com/photos/jellyfish/index.htm
in a short answer, yes. try looking on youtube for tangled jellyfish to see what I mean. and some jellyfish actually eat each other.
the box jellyfish does but not the other types of jellies; the box jellyfish does not seem to see white, but sees black and red.
Jellyfish.
they can scence it
No, jellyfish do not see. They have no eyes, and no brains either. They are extremely primitive organisms, the most primitive of all existing multicellular life.
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 do not have any vision. They have light sensitive organs, which informs them where light is, but cannot see.
Some jellyfish stings are dangerous to humans.
When I went a couple of days ago I did not see any jellyfish, but there was lots of other animals.