They stopped calling them "jellyfish" because they are not fish.
I took this picture in July 2003, at the Monterey Bay Aquarium
which you REALLY should visit -- on line if you cannot visit in person.
Trust me on that.
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The original was of course much sharper. I had to dink with the file to shrink size. It is HARD to take good pictures through that thick aquarium glass and in the difficult lighting conditions. But I did snag a few superb shots, and a few others that are far from superb, but still pretty good as mementos.