A giant predatory lizard swam in Antarctic seas near the end of the dinosaur age

Kaikaifilu is a new species of giant sea lizard (mosasaur) discovered in 66-million-year-old rocks of Antarctica. At about 10 meters long, it is the largest known top marine predator from this continent. It lived near the end of the dinosaur age, when Antarctica was a much warmer ecosystem, and fed on filter-feeding marine reptiles. 
Paleontology News — ScienceDaily