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Ichthyosaurs Pachystropheus rhaeticus Thalattosaur Behavior Thalattosaur Habitat Thalattosaur Diet Ontocetus Mosasaurids Mosasaurs Mosasauridae Marine Lizards Khinjaria acuta Cretaceous Period Top Predators Giant Ichthyosaur Discovery Ichthyotitan severnensis Ancient Shark Fossils Thalattosaurs Megatooth Sharks
Zinc isotope analysis of fossil teeth shows the predator fed across trophic levels based on local prey availability