Corydoras similis. Hieronimus, 1991. Common Name: Smudge Pot Corydoras. Distribution: Found in the Rio Madeira Basin, Brazil. Aquarium Catfish, Discus Aquarium, Planted Aquarium, Fish Aquariums, Tropical Freshwater Fish, Freshwater Aquarium, Tropical Fish, Cory Catfish, Plecostomus