The series primarily takes place in the benthic underwater city of Bikini Bottom, which is located in the Pacific Ocean beneath the real-life coral reef known as Bikini Atoll. In 2015, Tom Kenny confirmed that the fictitious city was named after Bikini Atoll, but denied an Internet fan theory that connected the series' characters to actual nuclear testing that occurred in the atoll. The citizens are mainly multicolored fish who live in buildings made from ship funnels and use "boatmobiles", amalgamations of cars and boats, as a mode of transportation. Recurring locations within Bikini Bottom include the neighboring houses of SpongeBob, Patrick, and Squidward; two competing restaurants, the Krusty Krab and the Chum Bucket; Mrs. Puff's Boating School, which includes a driving course and a sunken lighthouse building; the Treedome, an oxygenated glass enclosure where Sandy lives; Shady Shoals Rest Home; a seagrass meadow called Jellyfish Fields; and Goo Lagoon, a subaqueous brine pool that is a popular beach hangout.