South American lungfish, Lepidosiren paradoxa. Is the single species of lungfish found in swamps and slow-moving waters of the Amazon, Paraguay, and

- Image ID: MCWKJF
Paulo Oliveira / Alamy Stock Photo
Image ID: MCWKJF
lower Paraná River basins in South America. Its a air-breather and the sole member of Lepidosirenidae family. The gills are greatly reduced and essentially non-functional in the adults. The young become air-breathing at about seven weeks. Juveniles have external threadlike gills very much like those of newts. From Amazonas