A shark was found on the banks of Idaho’s Salmon River — a freshwater system. How did this happen?

Talk about an oddity.

A salmon shark was found on the banks of the Salmon River — a freshwater system — in Idaho on Tuesday, according to a report in the Idaho Statesman.

The strange occurrence was made known by the Idaho Department of Fish and Game, which released a photo of the dead sea creature. With the exception of the bull shark, sharks can not swim in freshwater. A salmon shark, which typically doesn’t grow more than 10-feet, have been occasionally seen off Washington state’s coast and, believe it or not, have been mistaken for a small great white.

But because Idaho is landlocked, state officials are skeptical the salmon shark found its way to the Salmon River on its own.

“No sharks have been observed swimming up our fish ladders lately, and the only known shark that can live in freshwater is the bull shark,” said Joe DuPont, the Clearwater Region fisheries manager via a written statement, according to the Statesman. “I think it is safe to assume that somebody dropped this on the shore for a good laugh. I certainly have laughed about it.

“This would have been a great April Fools joke.”

Ironically, as it name indicates, salmon sharks do like to feed on salmon, as well as squid, sablefish and herring.