Biological studies of Captina Creek and its tributaries, located in Belmont and Monroe counties, have revealed it as one of the best quality streams in Ohio. The mainstem of Captina Creek has scored the highest average fish diversity scores in the state, with 56 species sampled by the Ohio EPA. Additionally, average macroinverebrate diversity scores place Captina Creek among the 10 highest scoring watersheds in the state. Adding to its unique diversity, Captina Creek is home to the state endangered Eastern Hellbender salamander and it is one of only a few watersheds in Ohio where successful reproduction in the past decade has been documented. It also supports a healthy small mouth bass fishery and an abundance of other wildlife in its forested habitat.