'''Plesiosaurs''' are large [[reptiles]] characterized by long necks with small heads; stocky, finless tails; and a broad, turtle-like body with four flippered appendages. Using design inference based on their morphology, paleontologists believe that they were sea-dwelling carnivores that dined on fish and shellfish. | '''Plesiosaurs''' are large [[reptiles]] characterized by long necks with small heads; stocky, finless tails; and a broad, turtle-like body with four flippered appendages. Using design inference based on their morphology, paleontologists believe that they were sea-dwelling carnivores that dined on fish and shellfish. |