The food web illustrates the relationships among organisms and their sources of food. Algae is the food source for krill, which is the food for several carnivores. These carnivores are the food source for other carnivores, like the killer whale and the leopard seal.

The primary producer, herbivore, and carnivores in an Antarctic food web are linked by arrows to show the relationship between them.

Primary producer: Algae
Herbivore: Krill
Carnivore: Herring, anchovies, and squids; Blue whale; Antarctic petrel; Crabeater seal; Adelie penguin; Patagonian toothfish; Emperor penguin; Weddell seal; Ross seal; Leopard seal; Killer whale