The merger of Manly-North Shore United and Warringah Freshwater created the Manly Warringah Dolphins at the close of the 1991 NSW Division 1 season for the start of the upcoming NSW Super League season.
In the closing moments of the 1991 NSW Division 1 season, Manly-North Shore United and Warringah Freshwater merged to form the Manly Warringah Dolphins for the start of the new NSW Super League season.