The sudden appearance of a giant rubber duck in a Maine harbor is a whimsical whodunit that’s defied sleuths so far.

The yellow waterfowl emblazoned with the word “joy” appeared in Belfast Harbor over the weekend, and it’s a mystery who put it there.

Harbor Master Katherine Given told the Bangor Daily News that the 25-foot duck doesn’t pose a navigational hazard, so there’s no rush to shoo it away.

“Everybody loves it,” Given said. “I have no idea who owns it, but it kind of fits Belfast. A lot of people want to keep it here.”

Judy Herman of Bala Cynwyd, Pennsylvania, stopped to snap photos Tuesday.

“It’s wonderful,” she told New England Cable News. “Who would expect to see a duck in the middle of the water here?”

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Braves first baseman Matt Olson (left) is greeted by Ronald Acuña Jr. after batting during the MLB Home Run Derby as part of the All-Star Game festivities on Monday, July 14, 2025, at Truist Park in Atlanta. (Jason Getz/AJC)

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