The Game and Fish Department has found a new invasive species in Wyoming. It’s an alligator snapping turtle, which is native to southeastern states and can grow to be more than 200 pounds.

Lucy Diggins with the Game and Fish office in Green River says a fisherman caught the turtle on a lake near Pinedale over the weekend.

“He snagged what he thought was a turtle, using a lure, and quickly realized that this huge, armored turtle, with huge jaws and a long tail, probably was not a Wyoming native species,” Diggins said.

Diggins says turtles like that can harmful because they eat native fish. She adds that it’s expensive to remove illegal invasive species, and urges pet owners not to release non-native species into the wild.