The Queen Jellyfish looks like a regular jellyfish, except she's much larger. Her sting is also much more powerful. In SpongeBob's Atlantis SquarePantis, she is almost the same, but with a crown. She has six large magenta spots and seven tentacles.
She appears to be mean or at least protective when it comes to the other jellyfish. And she doesn't like when people bother her children, making her aggressive toward a person.
Abilities and talents
Like most jellyfish, her tentacles are electric. Unlike most other jellyfish, she can shoot electricity.
She first appears in "Jellyfishing." SpongeBob and Patrick take Squidward Jellyfishing, he finds a jellyfish and tracks it until it lands on the Queen Jellyfish. Squidward does not know that it is the Queen Jellyfish. He catches the jellyfish and in victory, he repeatedly hits the Queen Jellyfish until she gets up. She goes over Squidward and he "runs" away. Eventually, it ends with her zapping him. At the end of the episode, she returns after being summoned by the same Jellyfish from the previous day and zaps him again.
She is later mentioned in "I'm Your Biggest Fanatic" In Jellyfish Fields, after SpongeBob passes all of Kevin's tests, he says that they are going to catch the Queen Jellyfish as SpongeBob's final test. It should be noted that he actually says, "a Queen Jellyfish," not "the Queen Jellyfish," this means that there are others, possibly for each species of jellyfish. SpongeBob is then used as bait for the jellyfish, he claims that he has never seen a Queen Jellyfish before. The Jellyspotters leave and for hours, SpongeBob calls for the Queen. When he gives up, he notices what he thinks is the Queen Jellyfish. Later, SpongeBob finds out that it is a ship and what the Jellyspotters' true intentions were. They make fun of him and the King Jellyfish arrives. He thinks that it is the real Queen Jellyfish. He later finds out that it was not. After SpongeBob saves the day, Kevin says that SpongeBob is still not a member of the Jellyspotters because he did not catch a Queen Jellyfish. The other Jellyspotters take off Kevin's "crown" and give it to SpongeBob, making him a member.