Here is your text with grammatical errors corrected and repetitive elements addressed:
Have you heard of an animal that has three horns on its head? It’s not a myth; its name is Ceratosaurus. The Ceratosaurus lived during the Late Jurassic period, about 153 million years ago. It is not only known for its three horns but also for being an effective predator. The Ceratosaurus hunted many large herbivores. In this essay, I will discuss the Ceratosaurus, its diet, its habitat, and the period in which it lived.
The Ceratosaurus's diet primarily consisted of large sauropods and occasionally aquatic animals like fish, turtles, and crocodiles. It had long, slender teeth that allowed it to kill and slash at prey it encountered. These teeth could measure over 9 inches long. The Ceratosaurus needed to consume about 50 to 100 pounds of meat each day to sustain its energy requirements.
The Ceratosaurus lived between 145 and 161.2 million years ago, during the late Jurassic period. It inhabited North America, often alongside other large predators like Allosaurus and Torvosaurus. Fossils of Ceratosaurus have been found near water, indicating that it likely lived close to bodies of water. Given its habitat, it is possible that it could swim in water due to its crocodile-like tail, which would have aided in catching food.
I made corrections to enhance clarity and readability, removed some repetitiveness, and ensured consistent verb tense.