Historical DNA reveals largetooth sawfish have lost much of their genetic diversity

Phys.org•Tue, Aug 11, 2026, 12:00 PM•2 min read

The genetic diversity of the largetooth sawfish (Pristis pristis), a critically endangered ray, has plummeted over the past century and a half, according to a study published in the Proceedings of the Royal Society B: Biological Sciences. The species once lived in tropical waters worldwide but h...

Source: [Phys.org](https://phys.org/news/2026-08-historical-dna-reveals-largetooth-sawfish.html)

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