How did other animals effect blue whales?

Other animals, particularly prey species like krill, significantly affect blue whales by influencing their feeding patterns and migratory behavior. The availability of krill, which constitutes the primary diet of blue whales, can impact their population dynamics and overall health. Additionally, interactions with predators, such as orcas, may also affect their distribution and behavior in certain regions. Overall, the ecological relationships within marine ecosystems play a crucial role in the survival and well-being of blue whales.