Atretochoana eiselti
Nicknamed “Penis Snake” because of the way that it resembles the male organ, Atretochoana eiselti is not a snake at all. It is a limbless amphibian and the largest tetrapod without lungs. This species was known to the world only because Sir Graham Hales had managed to preserve two specimens that he found in the Brazilian rainforest in the 19th century.
