Largest plesiosaur
Who
Unknown
What
25 metre(s)
Where
United Kingdom (Fossilised specimens are relatively common and have been found in Europe and South America)
When

The largest plesiosaur ever to swim in the oceans was <EM> Liopleurodon</EM> , with a length of up to 25m (82 ft). <EM> Liopleurodon</EM> was a carnivore, with a short neck, a head 3m (10ft) long, and four powerful flippers. These relatives of the dinosaurs lived in the late Jurassic period, between 165 and 150 million years ago.