San Antonio River Authority Aquatic Biologists (left to right) Chris Vaughn, Larry Larralde, and Shaun Donovan put on waders before surveying the San Antonio River. Credit: Scott Ball / San Antonio Report
San Antonio River Authority Aquatic Biologists (left to right) Chris Vaughn, Larry Larralde, and Shaun Donovan get dressed into waders before setting out for the San Antonio River.