Father-of-four Pat Regan, 51, of Sandbrook Road, was shocked when he looked at his pictures and noticed the unidentified object to the left of the funnel cloud.
Mr Regan, who runs child care facilities in Formby, was fishing in Rufford Canal with his seven-year-old daughter Jasmine when the twister started.
He said: “I was clinging to a railway bridge holding my camera. I thought the object might have been a police helicopter but when it’s close up, it doesn’t look like one. I’m sceptical about these things but open minded. It’s an oval shape and I would like to know what it is.”