TLDR
Nikon disqualified the first-place winner of its Small World in Motion 2026 microscopy competition on 9 October for breaking its generative AI rules, after a PhD student found a SynthID watermark in the video. The winner denies using AI to generate it.
KEY TAKEAWAYS
Nikon has stripped the winner of its Small World in Motion 2026 microscopy video prize, ruling that the entry broke the contest's ban on generative AI after scientists found a Google watermark hidden in the footage.[1]
The video, by Dr Ning Xu of Tsinghua University, showed the beating airway cilia of a child with primary ciliary dyskinesia. Nikon announced the disqualification on 9 October and moved Nguyen Nam Nhat, whose video shows a tiny roundworm and a single-celled Dileptus, into first place.[2]
A watermark the judges missed
Scientists started questioning the clip after the competition posted it on LinkedIn. Edward Phelps, a bioengineering researcher at the University of Florida, said one structure in it "does not occur in biology."[3]
Ian Donovan, a PhD student at UT Southwestern Medical Center, wrote that the video carried "an embedded SynthID watermark identifying synthetic/AI-generated content."[4] SynthID is the invisible marker Google DeepMind puts in media made with its AI tools.
Xu denied breaking the rules. "AI was not used to generate the experimental movie, the cilia, or their motion," he said, adding that AI "was applied afterwards to the reconstructed grayscale data to distinguish and color structures with similar morphology."[4]
Nikon said the decision was about eligibility, not Xu's reputation or scientific work, and that it will review its rules and judging as imaging and AI tools change.[2]
University of Queensland developmental biologist Melanie White told Nature that scientific images are data, and that scientists "need to be able to trust that what we are seeing is grounded in the underlying measurement."[5]
Anyone can now run the same check
Two days before Nikon ruled, Google opened its SynthID Detector at synthid.com to everyone. Upload an image, video or audio file and it reports whether the watermark is there.[6]
It has limits. Google calls it "not a general AI detector": it only finds media from companies that use SynthID, and a clean result doesn't prove a file is human-made.[6]
For Australian brands that run photo, video or user-generated content competitions, the free check is now an easy step before a winner is announced. Nikon's experience shows what it costs to run it after.
SOURCES & CITATIONS
- PetaPixel: Nikon disqualifies winner of Small World in Motion (9 October 2026)
- Let's Data Science: Nikon disqualifies microscopy video over generative AI
- Gizmodo: Contest-winning microscope video is full of AI confabulations, scientists say
- CNN: Winner of Nikon microscopy contest faces criticism over AI usage
- Nature
- Search Engine Journal: Google opens its SynthID watermark detector to the public
FREQUENTLY ASKED QUESTIONS
What is SynthID and how does it work?
Can a creator accidentally trigger a SynthID watermark without using generative AI?
What does this mean for Australian brands running photo or video competitions?
James Dore is Strategy Director at Bushnote, a leader in SEO and AEO in Australia. He writes on search, AI and the technology decisions shaping government and industry.
