Jellyfish Fields is the main place where you can Jellyfish. It is revealed that Jellyfish Fields is right next door to Sandy's Treedome. Jellyfish Fields made its first appearance in the episode Tea at the Treedome where the happy camouflaged SpongeBob is trying to catch a purple white jellyfish. Jellyfish Fields returned in the episode Jellyfishing and the place's first main appearance was in the episode Nature Pants.
In Jellyfish Hunter, a rip-off of Jellyfishing, it's hinted that there are about 4 million jellyfish. SpongeBob and the other jellyfishers have caught 3,999,999 (and let them go), but could not catch one jellyfish they named No Name. When the Jellyfish Race in the Fields was running low, the sign that says Jellyfish Fields now crossed off the word million making the sign look like: Jellyfish Population: 4 when the original sign was Jellyfish Fields: Pop. 4 Million. The 1st main appearance of the entire Jellyfish population was in the episode Jellyfish Hunter.
In SpongeBob's Last Stand, a rip off of Once Bitten, the entire place was destroyed by Plankton for building the Shelly Superhighway. Then after the Jellyfish attacked Bikini Bottom then the highway was destroyed by everyone and Jellyfish Fields was restored.
- Jellyfish Fields: The main area of Jellyfish Fields
- Jellyfish Caves: The caves that Patrick went through in the video game, Battle for Bikini Bottom.
- Brain Coral Fields: This place is right at a cliff on the edge of Jellyfish Fields. Patrick got smarter in this place in the episode "Patrick SmartPants", a rip off of Dumped.
- Jellyfish Lake: A beautiful crystal clear water lake.
- Ol Spork Mountain: The mountain that King Jellyfish lives with a shower.
- Poison Sea Urchin Cave: Seen in "Nature Pants", a rip off of Home Sweet Pineapple, the poison sea urchin caves are filled with poison sea urchins. SpongeBob got bitten by them.
- SpongeBob Stones: Seen in the episode "Spongehenge", a rip off of Have You Seen This Snail, the SpongeBob Stones are eight musical stones like Stonehenge that stand in Jellyfish Fields. 3,000 years later, they still stand.
- In the episode The Pink Purloiner, a rip off of Patrick SmartPants, there was a big Jellyfish migration festival.
- The Jellyfish Field was also seen in Bossy Boots (rip off of I Was a Teenage Gary) Music Video.