|Colors:||Blue with dark blue spots|
|Kingdom:||Animalia (Animal) (WP)|
|First appearance:||"Tea at the Treedome"|
|List of species|
Blue Jellyfish are a rarely seen color variant of jellyfish and are thought to be a rare class of jellyfish.
Blue jellyfish are very rare. They are known to be very agile and stealthy, and they create blue jelly instead of pink like the pink jellyfish. SpongeBob (eventually) captured one called "No Name" in the episode "Jellyfish Hunter" and named him "Friend" before releasing him and giving him a "handshake."
Blue jellyfish are often seen in Jellyfish Fields.