12. Atretochoana
This slimy looking creature is known as the atretochoana. It is a type of caecilian or serpent-like amphibian that was discovered in the Brazilian rainforest and is one of two species of caecilians that do not have a set of lungs. How do they breathe? Their skin has capilliaries that can permeate the epidermis which enables gas exchange, and their skulls are known to have muscles that aren’t found in any other organism.