An international research team confirmed the longest-distance movement ever documented for a humpback whale, which was first photographed off Brazil in 2003 and reappeared in Australia in 2025—a journey exceeding 15,100 kilometers across two oceans. The finding, based on analysis of nearly 20,000 tail-fluke photographs collected over four decades, supports the hypothesis that whales occasionally exchange between breeding populations in Antarctica, potentially maintaining genetic diversity and enabling cultural exchange of songs.