Bikini Bottom is an under water town located beneath a tiny island which is recognizable by the bent palm tree. It's the residency for nearly all characters ever portrayed in SpongeBob SquarePants and comprises a lot of different sea creatures' homes. It's no different to any surface city comprising such things as fast food places and a driving school. In fact, it even has a beach!
The town attitude is very laid back, an influence of the Hawaiin "laid back" nature. It's a place where a whale can be friends with a sponge or a squirrel with a starfish. If it wasn't for the antics of SpongeBob SquarePants and Patrick it'd probably be the perfect place to live, albeit a lot less fun!
According to creator Stephen Hillenburg, Bikini Bottom is located in the Pacific Ocean, around Bikini Atoll. The show gives proof, the instances of which are listed below:
- In the episode Pranks A Lot, Sandy evacuates to Texas after being scared by ghosts (SpongeBob and Patrick). She is seen flying in from Texas's west, from the Pacific Ocean.
- In the game Employee of the Month, a fish states that Bikini bottom (and it's neighbouring cities) are located in the Pacific Ocean.
- During the "Goofy Goober Rock" in The SpongeBob SquarePants Movie, when the camera is shown rising out of the water and into Outer Space, it is shown coming out of the Pacific Ocean.
 SpongeBob's Pineapple
SpongeBob's Pineapple is SpongeBob's house. He lives here with his pet, Gary the Snail. His neighbors are Squidward Tentacles, and Patrick Star. Although the Pineapple is only within a mile of the Krusty Krab, it is shown that sometimes the walk is much longer. SpongeBob's Pineapple has been burnt, redecorated, and shrunk.
 Squidward's Moai Home
Squidward lives in a ancient art statue themed home. The house has two eyes, two ears, a mouth, a unibrow and a nose. Squidward's neighbors are SpongeBob SquarePants and Patrick Star. He lives right in the middle of both neighbors. Not always shown, but in a few episodes, it has been revealed that Squidward has a fenced-in backyard with a garden. It has also been shown that there is one extra window on the side of the house, facing SpongeBob's Pineapple. Squidward's house has been floated above the surface in a bubble, burnt to the ground, blown up, and given a monster like power to walk around and destroy the city.
 Patrick's Rock
Patrick Star lives in a brown rock, and with an antenna attached. In most episodes, the rock lifts and close on a enormous steel hinge facing away from the other homes. Also, it is shown in most episodes the inside of his home is a round circle made of just sand. In a few episodes a detailed version of Patrick's house is shown. Patrick lives to the far left of Squidward and SpongeBob. Patrick has no backyard or rooftop like his other neighbors, but it shows him sunbathing at the top of the rock.
 Sandy Cheeks' Treedome
Sandy Cheeks lives in an air dome. In the earliest episodes, SpongeBob and Patrick shriveled up in the dry air environment. Every episode afterward, sea creatures were to wear air helmets when entering her dome. Only when the dome was filled with snow were the sea creatures able to breath clearly, as the snow turned to water. Sandy's dome is filled with grass, a giant tree in which she sleeps in, and the front entrance which drains the water when opening the door. It has been shown before that a rocket and holder were positioned next to Sandy's dome, but not often.
 Krusty Krab
The Krusty Krab is the most popular restaurant in Bikini Bottom. The owner of the restaurant is Mr. Krabs with his two employees: SpongeBob, and Squidward. Although SpongeBob has been substituted before, there has only been one episode revealing who the fry cook was that worked there before SpongeBob. Patrick, and Pearl have worked in the Krusty Krab in the past as well. The Krusty Krab's prices are considered "cheap" by most citizens, but the restaurant still seems to fill up on a daily basis. Events such as Squidward's Talent Show, and the Comedy Corner have been held at the Krusty Krab before. The primary food the Krusty Krab sells are Krabby Patties, making the restaurant famous. The Krusty Krab has also been sold to other companies and remodeled, as well as suffering several blow ups and car crashes.
 Chum Bucket
The Chum Bucket is located across the street from the Krusty Krab. Plankton and Karen own the restaurant that fails to call in customers. The Chum Bucket's food is considered gross and unappetizing to the citizens of Bikini Bottom, so the restaurant fails to make money. The Chum Bucket is famous for the numerous amounts of attempts to steal the Krabby Patty secret formula. Both SpongeBob and Patrick have worked at the Chum Bucket. The Chum Bucket has been repainted, remodeled, and once changed into a novelty item store.
 Mr. Krabs and Pearl's Anchor
Mr. Krabs and Pearl live in a hollow black anchor. The house has many nautical paintings on the inside and has two gardens in the front yard. The location in Bikini Bottom of the house is unknown. Mama Krabs has an identical house, but is painted pink.
 Mrs. Puff's Boating School
Mrs. Puff's Boating School is a school for young drivers learning to drive a boat. The building has been shown in some episodes as a one room school house, while in others is a large school with hallways and lockers. Mrs. Puff is the main teacher who seems to teach the same room of students every day. SpongeBob has failed a million times, as revealed a million times, and one. During a later episode, SpongeBob's files are burnt so he starts at zero. Mrs. Puff's boating school has an unknown amount of boats, and a driving course in the back. There is a large lighthouse behind the school building in which many times SpongeBob has crashed into, forcing Mrs. Puff to puff up. The location of the building in Bikini Bottom is unknown, but is within walking and biking distance of SpongeBob house.
 Battle For Bikini Bottom
- On Top of the Pineapple
- On Top of Shady Shoals
- On Top of the Chum Bucket
- SpongeBob's Closet
- Annoy Squidward
- Ambush at the Treedome
- Infiltration at the Krusty Krab
- A Wall Jump in the Bucket
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