Fossils belonging to an 84-million-year-old freshwater sea monster have been found in Hungary, according to a new study. (Explore a sea monster interactive in National Geographic magazine.)

The recently unearthed creature belongs to a family of ancient aquatic reptiles known as mosasaurs, which looked like crosses between crocodiles and whales. Mosasaurs lacked the superlong necks found in plesiosaurs, which the legendary inhabitant of Loch Ness is alleged to be.

Dubbed Pannoniasaurus, the creature is the first mosasaur thought to spend its entire life in freshwater.