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Environment
Apr 30, 2026
Analyzed by GPT OSS 120B

Warming North Sea May Invite Great White Sharks Back to British Waters

AI Summary
Record‑high temperatures in the North Sea have revived interest in ancient marine predators, with new fossil evidence suggesting that great white sharks could return to UK waters as the sea continues to warm. Scientists warn that this shift could reshape the region's marine ecosystem.

Executive Overview: A Warming Sea Signals a Predator Comeback

Last year the North Sea hit an average surface temperature of 11.6°C, the warmest since records began in 1969, and researchers now argue that such conditions could lure great white sharks back to British coasts.

Record‑Breaking Temperatures and Fossil Discoveries

Scientists led by Olivier Lambert of the Royal Belgian Institute of Natural Sciences examined 5‑million‑year‑old whale fossils from North Sea sediments. The fossils contained shark tooth fragments, identifying a bluntnose sixgill shark and the extinct mako shark Cosmopolitodus hastalis, a close relative of today’s great white.

Temperature Data and Historical Climate Context

  • 1969‑present: long‑term monitoring shows a steady rise in sea‑surface temperature.
  • 2025: average surface temperature reached 11.6°C, the highest on record.
  • 5 million years ago: North Sea waters were warmer, supporting diverse whale and shark species.

Ecological Implications: Apex Predators on the Horizon

Modern North Sea habitats are too shallow for large whales, yet warming waters are already attracting more dolphins and seals. Lambert’s team predicts that these prey species could, in turn, draw great white sharks and other large marine predators into UK waters, reshaping the food web.

Looking Ahead: Scenarios for a Changing Marine Landscape

If the warming trend continues, the North Sea could become a seasonal corridor for great whites, potentially increasing human‑shark interactions and prompting new management strategies for fisheries and coastal safety. Ongoing monitoring will be crucial to anticipate and mitigate ecological and socio‑economic impacts.