Produced in association with National Geographic, Sean Phillips' Sea Monsters: A Prehistoric Adventure utilizes state-of-the-art three dimensional photography in order to tell the tale of Dolly, a prehistoric sea creature who negotiates the waters at a time when a sea divides North America into two parts. The film alternates between these fictional recreations, and modern scientists exploring these areas in the present day. ~ Perry Seibert, All Movie Guide
Sea Monsters: A Prehistoric Adventure is a film by National Geographic which is set in the Earth's prehistoric past. The film features state-of-the-art three dimensional photographic and computer generated characters/animals. The setting alternates between prehistory and modern day times in which scientists study the fossilized remains of the creatures in the film. It is filmed in 3D and requires 3D glasses.
The protagonist of the story is Dolly, a female Dolichorhynchops, who travels the Kansas Inland Sea, 82 million years during the late Cretaceous Period with her family. She gets attacked by a shark (Cretoxyrhina) which kills her mother; Dolly survives with a tooth embedded in her flipper. Later, Dolly's brother is swallowed whole by a young Tylosaurus, then an older Tylosaurus kills the the younger one, leaving Dolly alone. Then she becomes a mother and has three young of her of own. After seasons of traveling around the Inland sea and eventually rearing young herself, Dolly dies peacefully of old age.