Dorado (abbr. Dor, gen. Doradus) The Goldfish, or Swordfish. Dorado is a southern constellation that is distinguished only by containing most of the Large Magellanic Cloud and having, in Beta Dor, one of the brightest Cepheid variables (magnitude range 3.5 to 4.1, period 9.83 days). See below for details of the constellation's brightest stars.