The Greenville News says the agency dumped the 1.5-inch fish in the water Friday afternoon. More fish had been dumped in the water Thursday.
The nearly 500,000 fish came from the Dennis Wildlife Center Fish Hatchery in Bonneau.
Fisheries biologist Dan Rankin said the fish grow quickly. Rankin says the heavy rains this year should have boosted nutrients in the lake.
Pickens Rep. Davey Hiott says the fish will be a boost for fishing on the 56,000-acre lake.