Genetic research strengthens the case for recognising an extraordinary population of humpback whales, and underlines the urgency of protecting them.
Humpback whales are famous for their immense migrations. But in the Arabian Sea, one population feeds and breeds within the same region, remaining in tropical and subtropical waters throughout the year. Now, new research adds to evidence that these whales have followed a separate evolutionary path for tens of thousands of years.
Published in Frontiers in Marine Science, the study analysed mitochondrial DNA from 2,285 humpback whales, including samples collected off Oman. Researchers found significant genetic differences between Arabian Sea whales and the three recognised humpback subspecies, alongside the lowest genetic diversity of any ocean region examined.
Together with earlier evidence of their distinctive behaviour and isolation, the findings support recognition as a fourth subspecies, potentially named Megaptera novaeangliae indica. This is a proposal for a distinct group within the humpback whale species, rather than the discovery of a new species. The study itself does not establish formal recognition.
The conservation implications are pressing. Already assessed as an Endangered subpopulation, Arabian Sea humpbacks remain small in number, with no evidence of population growth over the past two decades. Entanglement in fishing gear, vessel strikes, underwater noise and pollution threaten their survival. The researchers call for coordinated conservation action across the region.
Whatever their eventual classification, protecting these whales cannot wait. Their disappearance would mean losing an irreplaceable part of the humpback whale’s evolutionary history.
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