Perennibranchiate, in zoology, is the condition of an organism retaining branchae, or gills, through life;William Benjamin Carpenter, 1854 This condition is generally said of certain amphibia, such as the menobranchus; the term is opposed to caducibranchiate. In some cases only a small proportion of a given amphibian population is perennibranchiate, but in other instances a preponderance of the individuals have an adult gill retention.