A giant hippo spanning over 23 metres long has surfaced on London's Thames.
The hippo is the work of designer Florentijn Hofman, known for the floating ducks that have appeared all over the world.
As a result of height restrictions and inspiration from his daughters books, the hippo is the newest incarnation of these floating artworks.
It took six weeks to design and another six weeks to build.
Hoffmann says there is a secret inside the hippo, but he is not revealing what that could be just yet.