In an ecosystem, the tertiary consumers are organisms that occupy the top of the food chain. They are carnivores that feed on secondary consumers, which in turn feed on primary consumers. Tertiary consumers play a crucial role in maintaining the balance of the ecosystem by controlling the population of lower-level consumers.
Some examples of tertiary consumers include large predators such as lions, sharks, eagles, and killer whales. These animals rely on consuming other carnivores or omnivores for their energy needs.