Looking for answers, the Swiss development consultant shared her photos with a marine identification group on Facebook. The answers were imaginative, to say the least. “Baby Loch Ness monster,” said one person. “Voldemort, I think,” said another, referring to the villainous Harry Potter character. Others suggested it was a mermaid, a “demogorgon” – the monster from the Netflix series, Stranger Things – or more simply “the stuff of nightmares”. But others thought that the jaws-within-jaws offered a clue.