In the season 3 episode "Krusty Krab Training Video", the Krusty Krab building is shown to have originally been a run-down retirement home called the Rusty Krab, which Mr. Krabs acquired and converted into a restaurant. In another episode, the restaurant was also the name of a pirate ship owned by Mr. Krabs before he started the business. The restaurant has seen a lot of temporary changes throughout the show, such as operating 24/7 and being transformed into a hotel, which have been the focus of many episodes. Other episodes have depicted the Krusty Krab being damaged or destroyed.
