ScottBall_SARA_Freshwater-Mussels_San_Antonio_River_Biology_Scientists_1-23-2017-7

San Antonio River Authority Aquatic Biologists (left to right) Shaun Donovan, Chris Vaughn, and Larry Larralde use their hands to feel rocks that could be housing Golden Orb mussels.

San Antonio River Authority Aquatic Biologists (left to right) Shaun Donovan, Chris Vaughn, and Larry Larralde search for Golden Orb mussels. Credit: Scott Ball / San Antonio Report

San Antonio River Authority Aquatic Biologists (left to right) Shaun Donovan, Chris Vaughn, and Larry Larralde use their hands to feel rocks that could be housing Golden Orb mussels.