One late August morning, biology major Desmond Edwards ’16 donned waders to go fishing in a small creek two miles south of Selinsgrove. But instead of using rod and reel, the senior from Carbondale, Pa., was “electrofishing.” Strapped to his back was a $10,000, 20-pound battery pack sending 200 volts through the water via a coiled wire trailing behind him and a diamond-shaped metal wand he waved underwater in front of him.