dorado (n.)

large, colorful tropical fish, also known as (dolphin and mahi-mahi), c. 1600, from Spanish dorado, literally "gilded," past participle of dorar "to gild," from Latin deaurare "to gild, to gild over," from de-, here probably intensive, + aurare "to gild," from aurum "gold" (see aureate). The small Southern constellation was among those added by Dutch navigators Pieter Dirkszoon Keyser and Frederick de Houtman during their voyage of 1595-97 for Flemish cartographer Petrus Plancius.