Narwhals have endured a million years with low genetic diversity, and they’re thriving — ScienceDaily

Researchers have sequenced the genome of a narwhal, the Arctic whale famous for the horn-like tusk protruding from its forehead. Their work finds that compared to other Arctic marine mammals, narwhals have low genetic diversity, which typically indicates a species is struggling. However, narwhal populations number in the hundreds of thousands — but researchers warn they are still vulnerable to climate change and human activities in the Arctic.

Source: Narwhals have endured a million years with low genetic diversity, and they’re thriving — ScienceDaily