 The citizens live in mostly aquatic @-@ themed buildings and use " <unk> " , amalgamations of cars and boats , as a mode of transportation . Recurring establishments present in Bikini Bottom include two competing restaurants , the Krusty Krab and the Chum Bucket ; Mrs. Puff 's Boating School ; and Shady Shoals Rest Home . Goo Lagoon , a popular beach hangout , is within the vicinity of the city , as is Jellyfish Fields . There are also a few episodes with businesses such as the grocery store , joke store , and mattress store . 
