Behold the Tennessee Logperch.
The fish, a darter, can grow to be 6 inches long. It has flattened little splotches on its flanks. That the splotches are flattened is important; those are what first led TVA aquatic biologist Jeff Simmons and Yale professor Tom Near to suspect they had discovered a new fish.
Simmons explains that finding a new species of fish in the 21st century is more a matter of closely observing what is before our eyes than coming upon a lost island that holds two-headed dragons.
Read more at our news partner's website, knoxnews.com.