The Titicaca orestias (Orestias cuvieri), also known by its native name amanto, is a likely extinct freshwater killifish from Lake Titicaca in South America. It belongs in the pupfish genus Orestias, endemic to Altiplano lakes in the Andes. With a body length of 22 cm (8.7 in), it was the largest member in that genus. In the hope that an undiscovered population remains, it is listed as Data Deficient by the IUCN. Despite its name, it is not the only Orestias from Lake Titicaca.