London — Bluefin Tuna Return to British Waters in Large Numbers

What did researchers find about bluefin tuna in UK waters?

Bluefin tuna have returned to waters off the British coast in significant numbers after nearly vanishing from the region, according to BBC News. The finding is one of several wildlife recoveries cited in WWF's Living Planet Report 2026, produced in partnership with the Zoological Society of London, which tracks roughly 36,000 populations across nearly 6,000 species of mammals, birds, fish, reptiles and amphibians.

Why did bluefin tuna disappear in the first place?

The UK once supported large bluefin tuna fisheries, but overfishing of the tuna itself and of the smaller fish it feeds on left the species largely absent from British waters by the 1960s, the report found.

What explains the recent recovery?

WWF credited a sustained international management effort: reduced catch quotas, size limits, and protection of spawning grounds, reinforced by campaigns from consumers, chefs and retailers. Hannah Rudd, head of marine at the Angling Trust, described the rebound as close to an "explosion" in the population and called bluefin tuna "a golden case study that fisheries management works," according to the BBC. Mike Barrett, chief scientific adviser at WWF-UK, told the broadcaster the pattern across recovered species was a clear goal, a credible plan, and people who believed they could make a difference — what he termed "the science of hope." "Hope is not the same thing as wishful thinking," Barrett said. "Hope's about action."

What other species recoveries appear in the report?

The Living Planet Report 2026 also recorded wild tiger numbers rising more than 70%, from an estimated 3,200 in 2010 to about 5,700 in 2025. The green sea turtle last year became the first marine turtle species reclassified from "endangered" to "least concern" following roughly 50 years of conservation work across about 80 countries, the report found. Elephant populations in parts of southern Africa were reported as stable or growing, which the report linked partly to laws granting local communities a share of tourism revenue tied to elephants.

Does this mean global wildlife trends are improving?

No. Despite these individual recoveries, WWF estimated that monitored wildlife populations worldwide have fallen by an average of 73% since 1970 — a measure of average population-size change, not a raw count of animals lost. About half of tracked populations were stable or growing, but those gains were outweighed by losses elsewhere, according to the report. WWF described nature as remaining in "freefall" overall, even as it framed the report as one of hope rather than despair.

What to watch next

• Whether bluefin tuna quotas and spawning-ground protections hold as populations expand
• Future Living Planet Report editions tracking whether tiger and elephant gains continue regionally
• Any shift in the global 73% decline figure as more monitored populations are added
• Policy responses citing the report's "science of hope" framing in fisheries or wildlife debates

For related HTT coverage, see What We Know About Meta's New AI-Focused Subscription Plans.