With its mysterious dark hump floating in the water, you'd be forgiven for thinking you'd just spotted the Loch Ness Monster.
And onlookers thought just that - after they were fooled into believing it was the legendary creature.
On closer inspection, experts say it is likely to be a basking shark lurking near the shoreline of the famous beach resort of Skegness.
Read more: #003399;" target="_blank">http://www.dailymail.co.uk/news/article-2189371/Forget-Nessie-Skegness-Monster-Mysterious-sea-creature-spotted-bobbing-coast-beach-resort.html#ixzz23krfdNah
From YouTube: Spotted this thing swimming in the sea at Skegness beach... Some kind of monster?