On 8 May 1971 "Queen Mary" opened her doors to tourists. Initially, only portions of the ship were open to the public as Specialty Restaurants had yet to open its dining venues and PSA had not completed work converting the ship's original First Class staterooms into the hotel. As a result, the ship was open only on weekends. On 11 December 1971 Jacques Cousteau's Museum of the Sea opened, with a quarter of the planned exhibits completed. Within the decade, Cousteau's museum closed due to low ticket sales and the deaths of many of the fish that were housed in the museum. On 2 November 1972 the PSA Hotel Queen Mary opened its initial 150 guest rooms. Two years later, with all 400 rooms finished, PSA brought in Hyatt Hotels to manage the hotel, which operated from 1974 to 1980 as the Queen Mary Hyatt Hotel.