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North Sea squid populations surge due to rising water temperatures
Rising water temperatures in the North Sea are driving a significant shift in marine ecosystems, leading to an influx of squid and octopus species along the Belgian coast. Scientific data indicates that surface temperatures in 2025 were 0.9 degrees Celsius warmer than the 1997–2021 average, creating an ideal environment for cephalopod eggs, which require temperatures between 9 and 11 degrees Celsius to survive.
This warming trend has seen the southern, shallower parts of the North Sea increase in temperature by four degrees over the last century. As a result, traditional catches like cod and crab are being supplemented or replaced by massive quantities of squid and octopus. The decline in cod reproduction due to heat is further reducing competition for these new arrivals. Tom Premereur, Director of the Flemish Fish Auction, noted that while fishermen caught almost no squid eight or nine years ago, they now find them making up the majority of their catches.
Entities
Flemish Fish Auction · Flemish Institute for Agriculture and Fisheries · Hans Polet · North Sea · Tom Premereur
Claims
What the coverage asserts, and how many sources carry each claim.
- [● 4 SOURCES] Squid and octopus have transitioned from being absent in fishing nets eight to nine years ago to making up the majority of catches today. www.harzkurier.de · www.braunschweiger-zeitung.de · www.morgenpost.de · www.otz.de
- [● 4 SOURCES] The southern, shallow part of the North Sea has warmed by four degrees over the last century. www.harzkurier.de · www.braunschweiger-zeitung.de · www.morgenpost.de · www.otz.de
- [● 4 SOURCES] The surface water temperature in 2025 was 0.9 degrees warmer than the 1997–2021 average. www.harzkurier.de · www.braunschweiger-zeitung.de · www.morgenpost.de · www.otz.de
- [● 4 SOURCES] Cephalopod eggs can now survive well in the North Sea due to rising temperatures. www.harzkurier.de · www.braunschweiger-zeitung.de · www.morgenpost.de · www.otz.de
- [● 4 SOURCES] Rising water temperatures are hindering cod reproduction, reducing competition for squid species. www.harzkurier.de · www.braunschweiger-zeitung.de · www.morgenpost.de · www.otz.de