what kind of animals were founds in the sea at that time?
Rays, modern sharks and teleosts
Cretaceous
n the seas, rays, modern sharks and teleosts became common
what is psittacosaurus? It is a genus of extinct ceratopsian dinosaur from the Early Cretaceous what kind of flora existed during the said period? Flowering plants, Mesozoic gymnosperms, Gleicheniales
wiki:1534499
Cretaceous [SEP] Marine fauna
In the seas, rays, modern sharks and teleosts became common. Marine reptiles included ichthyosaurs in the early and mid-Cretaceous (becoming extinct during the late Cretaceous Cenomanian-Turonian anoxic event), plesiosaurs throughout the entire period, and mosasaurs appearing in the Late Cretaceous. "Baculites", an ammonite genus with a straight shell, flourished in the seas along with reef-building rudist clams. The Hesperornithiformes were flightless, marine diving birds that swam like grebes. Globotruncanid Foraminifera and echinoderms such as sea urchins and starfish (sea stars) thrived. The first radiation of the diatoms (generally siliceous shelled, rather than calcareous) in the oceans occurred during the Cretaceous; freshwater diatoms did not appear until the Miocene.