Lake Managua and concrete wharf was constructed and a sight seeing boat called "La Novia de Xolotlán" makes hour-long lake tours when there are sufficient tourists. About 20 fish species still survive in Lake Managua. While joined to Lake Nicaragua, the bull sharks of that lake cannot migrate to Lake Managua due to a high waterfall on the Tipitapa River. Lake Managua Lake Managua () (also known as Lake Xolotlán) (located at ) is a lake in Nicaragua. The Spanish name is Lago de Managua or Lago Xolotlán. At 1,042 km², it is approximately long and wide. Similarly to the name of
Managua Somoza García and his family (1936–1979), the city was rebuilt and began to grow rapidly. New government buildings were erected, industry developed, and universities were established. The city's development caught the attention of Irving Fields and Albert Gamse, who composed a musical piece about the city that became popular in the 1940s through the performances of Freddy Martin, Guy Lombardo and Kay Kyser. Managua had become Central America's most developed city. Today's references differentiate the pre-1970s Managua by labeling it as "La Antigua Ciudad," which in English translates to "The Ancient City" or "The Old City". Managua's progress came to