The Glowing Three-Spot is a rare type of jellyfish. It only comes to Jellyfish Fields in the yearly jellyfish migration. The jellyfish also has relatives which are the Golden Singer Jellyfish and the Lime Dragon Jellyfish. It first appears in the episode "The Pink Purloiner" and also makes a cameo in "SpongeBob's Last Stand."
It is a pink jellyfish with three spots and six tentacles. As the name suggests, it glows. The species looks like a regular jellyfish, but has three spots, glows, and has six stingers.
Role in series
"The Pink Purloiner"
It appears while SpongeBob is talking about the jellyfish species. He sees it and says that it's a glowing three-spot.
"SpongeBob's Last Stand"
SpongeBob finds it while they are jellyfishing at the start of the episode.