Corythosaurus shared its subtropical, shoreline habitat with fish, turtles, lizards, crocodiles, and a host of other dinosaurs, including an early cousin of Tyrannosaurus called Albertosaurus, the ostrich-mimic dinosaur Struthiomimus, the armored dinosaur Euoplocephalus, duckbills Prosaurolophus and Lambeosaurus, the dome-headed dinosaur Stegoceras, and the horned dinosaurs Centrosaurus, Monoclonius, Chasmosaurus, and Styracosaurus.