Answer: The largest animal known to have lived in the Late Triassic seas was an ichthyosaur. Option C.
Step-by-step explanation:
Ichthyosaurs were marine reptiles that lived during the Mesozoic Era, including the Late Triassic period. They were well-adapted to an aquatic lifestyle and had streamlined bodies, similar to dolphins or sharks, allowing them to swim swiftly through the water.
Ichthyosaurs came in various sizes, with some species reaching impressive lengths. The largest known ichthyosaurs, such as Shonisaurus sikanniensis, could grow up to 21 meters (69 feet) long. These massive creatures were top predators of their time and likely fed on a diet of fish and other marine organisms.
Ichthyosaurs had long snouts filled with sharp teeth, enabling them to catch and consume their prey. They possessed large eyes, indicating that they were well-suited for hunting in deep waters. Their bodies were streamlined, and they had a powerful tail for efficient swimming.
It is important to note that while ichthyosaurs were the largest known animals in the Late Triassic seas, there were other marine creatures present during this time as well, such as plesiosaurs, sharks, and ammonites. However, based on current scientific knowledge, ichthyosaurs are considered the largest animals of that period.