NEWAYGO, Mich. (AP) — A Michigan man has caught a rare orange fish on the Muskegon River.

Paul Gillis caught the fish Saturday while on a fishing trip with his brother and daughter.

Gillis said he first thought he’d caught a goldfish. But Department of Natural Resources Fisheries Wildlife Biologist Kevin Wehrly identified the fish on Wednesday as a rarely-spotted, orange-colored smallmouth bass.

“Although we can’t say that this gold smallmouth bass is a one-in-a-billion catch, we do know that it is extremely rare,” he said.

The fish has a genetic condition called Xanthism, which causes yellow pigments to be more pronounced, Wehrly said.