Family of amphibians
Typhlonectidae, also known as aquatic caecilians or rubber eels, are a family of caecilians found east of the Andes in South America.
They are viviparous animals, giving birth to young that possess external gills. Of the five extant genera in the family, "Atretochoana", "Potamotyphlus" and "Typhlonectes" are entirely aquatic, while "Chthonerpeton" and "Nectocaecilia" are semi-aquatic. "Atretochoana" reaches in length, but other species in the family range from . A sixth typhlonectid genus, "Ymboirana", was recently described and is known exclusively from fossil material. 
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