The DSS's relationship with the Nurseries is unknown, and the pliosaurs don't seem to be deliberately provocative like raptors and T. rexes are, but it is likely to be cautious, since the pliosaurs are large, possibly dangerous carnivores. However, they don't seem to be allied with other carnivores - Janice's group of terror birds planned to raid the pliosaur worlds for young as a food source.