Paleontologist: Plesiosauromorphs were gigantic, long-necked marine reptiles that ruled the oceans during the age of the dinosaurs  Most experts believe that plesiosauromorphs lurked and quickly ambushed their prey  However, plesiosauromorphs probably hunted by chasing their prey over long distances
Plesiosauromorph fins were quite long and thin, like the wings of birds specialized for long-distance flight
Birds and reptiles share many physical features because they descend from common evolutionary ancestors.