2026年的南半球鲸鱼迁徙季被海洋科学家描述为“前所未见”，这一判断基于观测到的显著异常迹象，包括座头鲸数量大幅下降、活动范围远离海岸以及缠绕事故增加 1。西澳大利亚Cape Naturaliste的年度普查数据显示，该地鲸鱼数量锐减高达60%，同时搁浅数量也处于高位 1。此外，鲸鱼缠绕事件呈上升趋势，从2025年的约50起增加到今年的近60起，增幅达20% 1。这种低目击率并非局部现象，美国东海岸在2026年至今已报告了31起大型鲸鱼缠绕事件，哥伦比亚北部和法属波利尼西亚也记录了极低的鲸鱼目击率 1。库克群岛的研究人员指出，伴随异常天气和早发气旋，2026年是他们近三十年职业生涯中最不寻常的季节 1。
在座头鲸表现低迷的同时，澳大利亚东海岸却罕见地出现了大规模假虎鲸群体 1。8月初，研究人员在昆士兰黄金海岸附近发现了数百头假虎鲸，六周后又遇到约50头正在进食的假虎鲸群 1。综合这些全球范围内的数据变化，研究人员认为这些迹象可能反映了海洋条件的变化 1。鉴于此，科学界呼吁加强跨洋协作监测，并改善政府资金与救援支持以更好地保护鲸类种群 1。
The 2026 Southern Hemisphere whale migration season has been described by marine researchers as unprecedented, marked by a significant decline in humpback whale numbers and unusual encounters with false killer whales. 1 In Western Australia, the annual census at Cape Naturaliste revealed that whale populations had dropped by as much as 60%, accompanied by high stranding rates. 1 Researchers suggest these signs may reflect changes in ocean conditions and have called for enhanced cross-ocean collaboration on monitoring, as well as improved government funding and rescue support to protect whale species. 1
Entanglement incidents have also risen notably during this season. 1 The number of entanglements increased by 20%, rising from approximately 50 cases in 2025 to nearly 60 this year. 1 This trend is not isolated to Australian waters; the US East Coast has reported 31 large whale entanglement events so far in 2026. 1 Meanwhile, along the eastern coast of Australia, hundreds of false killer whales were discovered near Queensland’s Gold Coast in early August, followed by a feeding group of about 50 individuals six weeks later. 1 Similar extremely low whale sighting rates have been recorded in northern Colombia and French Polynesia. 1 A researcher in the Cook Islands stated that 2026 was the most unusual season in their nearly 30-year career, coinciding with abnormal weather patterns and early cyclones. 1
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