During the spring season, one sea animal that can be frequently observed migrating from Australia back to Antarctica is the humpback whale (Megaptera novaeangliae). Humpback whales undertake one of the longest migratory journeys of any mammal. They spend the summer months in Antarctica, feeding on krill and small fish, and then migrate to warmer waters for breeding and calving during the winter. As spring arrives, humpback whales make their way back from their breeding grounds in places like the Great Barrier Reef off the coast of Australia to their feeding grounds in the nutrient-rich waters of Antarctica. This migration often offers opportunities for whale watching and observing these magnificent creatures as they journey through the oceans.