Imagine Robert Robinson asking "What Is This?" while hosting 'Ask The Family' (ask yer parents or grandparents!) source: https://twitter.com/qikipedia/status/1017434650422235137 Spoiler: Answer It's the rows of teeth of a Tawny Nurse Shark. https://en.wikipedia.org/wiki/Tawny_nurse_shark
I presume this thread was inspired by this story? https://www.bbc.co.uk/news/world-us-canada-44791774
I saw the picture on the QI twitter feed. It mentions 'a woman' but doesn't name her so it may be that's where they got the story from.
Then I'm surprised you have the energy and time to visit football forums. I mean, Robert Robinson! PHWOOAAARRRR!!
Thought it was similar to this skull bone cancer image I saw on Reddit the other day until I saw the comments:
Good god, was there really that on TV before? That is quite the wow moment. The more you watch the worse it gets.