The species can't survive in colder waters, but the Glade Run Lake Conservancy says its presence is concerning.

By: KDKA-TV News Staff

JEFFERSON TOWNSHIP, Pa. (KDKA) – A fish related to piranhas and native to South America has been found in Butler County.

The Glade Run Lake Conservancy says a fish identified as a pacu was recently found on the bank of the lake.

They say the species can’t survive in colder waters, like those in southwestern Pennsylvania, but its presence is a “cause for concern.” Introducing exotic and nonnative species can potentially upset the ecological balance of the lake.

According to the Butler Eagle, the foot-long carcass was found by a Jefferson Township resident while walking. The Butler Eagle reports the conservancy believes the fish must have been released into the lake by someone who had it as a pet.

Glade Run Lake is a 52-acre impoundment owned by the state and managed by the Fish and Boat Commission.