 The Late Jurassic life of Tendaguru is very similar to that found in western North America's Morrison Formation.During the Jurassic period, the primary vertebrates living in the sea were fish and marine reptiles.The latter include ichthyosaurs, which were at the peak of their diversity, plesiosaurs, pliosaurs, and marine crocodiles of the families Teleosauridae and Metriorhynchidae.