American artist Janet Echelman makes huge, sculptural nets that are colorful and billowing during the day, and light up the skyline like beautifully bizarre jellyfish at night. More examples at this website and a link to Echelman website
Jellyfish: man's new best friend? It's finally possible with the Desktop Jellyfish Tank. Jellyfish can't live in a regular fish tank because they will get stuck in corners and sucked into filtration intakes.