(KUTV) -- The Utah Division of Wildlife Resources is draining Kolob Reservoir this fall to remove illegally stocked fish.
The state agency said it has recently discovered three illegally stocked fish species in the reservoir located in the headwaters of the Virgin River drainage.
The species — yellow perch, green sunfish and bluegill — pose a substantial threat to the endangered fish species that live downstream in the Virgin River, DWR said in a Facebook post.
The body of water will be treated with rotenone to remove all of the fish. DWR announced that effective Friday, the daily bag and possession limit is eight trout, with no size restriction.
"You can also use bait," DWR stated in its post.
If you have information about who introduced perch, sunfish and bluegill to Kolob Reservoir, please call the UTiP hotline at 1-800-662-3337.
A reward of up to $3,000 is offered for details that lead to the prosecution of those responsible for illegally introducing fish to Kolob, which is managed by the Washington County Water Conservancy District.