Natovenator Polyodontus is a long-necked, swan-like dinosaur that lived in the Cretaceous period, about 72 million years ago. More than 100 small teeth were found in its jaws.
It was the world's first swimming dinosaur adapted to a semi-aquatic lifestyle in a freshwater ecosystem.
Recently, a well-preserved fossil of this organism has been discovered in the Gobi Desert of Mongolia.