Notable species of salamander include Jordan's salamander and hellbender. Examples include the hellbender salamander and the Lake Titicaca water frog. Unlike most salamanders, the hellbender performs external fertilization. Recreation in Ozark hellbender habitat also harms populations. Wild Ozark hellbender populations are dominated by these older and larger individuals. The Ozark hellbender became a candidate for listing under the Endangered Species Act in 2001. The legendary hellbender inhabits the range's swifter streams. The disease has been detected in all Missouri populations of the Ozark hellbender. There is currently no critical habitat designated for the Ozark hellbender. The endangered Eastern Hellbender "(Cryptobranchus alleganiensis alleganiensis)" also lives in the river. Human and livestock waste from the areas surrounding hellbender habitat have further decreased water quality. The decline of the Ozark hellbender was first recognized in the 1990s. Additionally, direct removal from the environment has contributed to the decline of the Ozark hellbender. Cho is eventually captured by Lady Hellbender. The origin of the name "hellbender" is unclear.