Two employees at Alaska's Bureau of Land Management captured video of something slowly moving in the river.
Alaska's Bureau of Land Management posted a facebook video on Oct. 26 of what the department called a "strange thing" swimming in the Chena River.
Since then, that "strange thing" has been likened to Scotland's famous Loch Ness monster, according to ABC News.
The bureau credited its employees Craig McCaa and Ryan Delaney with capturing the now-viral video.
"It never fully revealed itself," McCaa told Alaska Dispatch News.
McCaa added that he and Delaney made a few alterations to the video, such as speeding it up slightly and adding minor sound effects.
He told Alaska Dispatch News that the "strange thing" was between 12 to 15 feet long and swirled back and forth in the current.
"I initially thought, and several people thought, it could be some rope that snagged on the bottom of the river with chunks of ice," McCaa told the Alaska Dispatch News. "Other people have mentioned everything from sea monster to giant sturgeon."
Those on social media have their own ideas about what the "strange thing" might be. The theories have ranged from it being a "zombie salmon" to mysterious, and fake beast called "The Chena Chomper," according to ABC news.
WATCH| For the news you need, check out our 60 Second Circa.