The Inland Fisheries Division, a department with Texas Parks and Wildlife, says a high level of golden algae is to blame for the thousands of dead fish washing up along the banks of the Concho River near the Runnels/Tom Green County line.
Officials took several water samples over a 10 mile stretch of the river and the toxicity test results indicated a high level of golden algae in the area.
The single-celled organism naturally occurs but normally at low levels, but when it blooms this algae can produce toxins that affect organisms with gills. It is not harmful to humans, other mammals or birds.
Authorities say it is expected to subside on it’s own over time.
Another case of golden algae was reported earlier this spring in the Colorado River at OH Ivie.