A team of deep sea treasure hunters investigating a bizarre formation below the Baltic Sea said over the weekend it’s definitely not a UFO.
"It's not, obviously, an alien spacecraft.
It's not made of metal," Peter Lindberg, the leader of the Ocean Explorer team, told Fox News. He also noted it appeared to be some sort of "natural, geological formation."
It is likely a rock, the team said, but it still presents a bit of a mystery.
"During my 20-year diving career, including 6,000 dives, I have never seen anything like this," Stefan Hogeborn, one of the divers at Ocean Explorer Team, said in a news release posted to the team's website on Saturday.
Images of the bizarre shape, which made the object appear to resemble the famed starship from the "Star Wars" films, were first captured by Ocean Explorers in August 2011.
The photo sparked wild speculation, and garnered so much interest that the team was able to raise the money needed for a full-fledged dive.
Lindberg, along with scientists and divers, spent 12 days exploring the 200-foot-wide object and are in the process of reviewing the footage.
In the news release, the team described the formation as a "huge mushroom," with "rounded sides and rugged edges."