Occasionally sperm whales are preyed upon by orcas. Minke whales are the smallest of the Baleen whales . They are the most numerous of the whale species. They feed on krill and are preyed upon by Japanese and Norwegian whalers for supposedly 'scientific purposes'. Blue whales are the largest animal on earth.
Blue whales feed on krill.
They are preyed upon by man and by killer whales. Summary In the Antarctic, living things and their relationships in the food web are greatly influenced by the physical environment . The food web itself is a relatively simply one, consisting of many species in very few trophic levels . The primary producers in the Antarctic food web are phytoplankton . The primary consumers are zooplankton .