Glowing Jellyfish

In the Will Smith movie Seven Pounds, Will Smith's character had a pet jellyfish which was an important piece to the end of the movie.
On an episode of Survivor Palau, the team winning the reward challenge got to swim in Jellyfish Lake, a lake full of golden jellyfish, which are harmless to Humans..
On the "A Star is Born Again" episode of The Simpsons, the fictional town of Springfield holds a Jellyfish Festival, portrayed as a magical evening celebrating the waters and beach being overrun with jellyfish.