Production Companies: City Productions , Cineblue Internationale Filmproduktionsgesellschaft , Lakeshore Entertainment , Screen Gems , Cinerenta .
Overview: After a group of biologists discovers a huge network of unexplored caves in Romania and, believing it to be an undisturbed eco-system that has produced a new species, they hire the best American team of underwater cave explorers in the world. While exploring deeper into the underwater caves, a rockslide blocks their exit, and they soon discover a larger carnivorous creature has added them to its food chain.
, Screen Gems 
, Cinerenta .
