Undated photo issued by the International Union for Conservation of Nature, showing Tucuxi (Sotalia fluviatilis) dolphin. A report published Thursday December 10, 2020, by International Union for Conservation of Nature (IUCN), highlights that all four known freshwater dolphin species including the tucuxi dolphin in the Amazon river system, are now threatened with extinction. (Photo by Fernando Trujillo/IUCN via AP Photo)
