After a temperature spike in the mid-Cretaceous, the climate began to cool, and the tenor changed. Other creatures ... and modern sharks became common. Sea urchins and sea stars (starfish ...

Xiphactinus was one of the largest bony fish of the Late Cretaceous and is considered one of the fiercest creatures in the sea. A powerful tail and winglike pectoral fins shot the 17-foot-long (5 ...

Sea levels were higher ... and other important creatures from lower trophic levels. In addition to spotlighting this one incredible Cretaceous community, the study's authors say their work should ...

Sea Level The presence of 65- to 70-million-year-old fossilized ocean creatures thousands of feet ... that ocean levels fell dramatically as the Cretaceous period came to a close.

Researchers said further examination of the fossil could provide insights into the relationship between predators and prey in the Cretaceous-era sea ... whether these animals deliberately ate ...