The Golden Dorado or Salminus brasiliensis is a species of trophy fish that is considered to be one of the hardest fish to catch pound for pound. Also known as the River Tiger, they have the ability to leap out of the air with ease and have unmatched fighting power and stamina. Anglers from all over the world come to places like Argentina, Paraguay, Uruguay, Bolivia and Brazil to seek out these tasty fish! The warm waters of the Plate and Amazon systems are the best places to find these freshwater fish. It is also the national fish of Argentina where it is illegal to catch one.