👉 Cercozoan is a genus of extinct marine reptile that lived during the Late Cretaceous period, around 68 million years ago. They were characterized by their large size and elongated bodies, with an overall length of up to 12 feet (3.7 meters) and a head diameter of about 3 feet (0.9 meters). Cercozoan lived in the oceanic trenches at depths of approximately 600 to 550 feet
Cercozoan