Marine Heatwaves and El Niño Are Disrupting Fisheries

Warming waters alter where fish and shellfish live, push them beyond what they can tolerate and increase risk of disease.

By: Gaea Cabico

Outlets: Sentient

Published: September 15, 2026

Words: 1,295

Last Updated: 3 days, 6 hours ago

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Last month, Peru closed its anchovy fisheries after catching less than a quarter of its quota due to the El Niño-linked unusually warm waters that drove the small, silver fish to seek cooler and deeper waters beyond the fleet’s reach. Much of the world’s fishmeal and fish oil comes from anchovies caught off the coast of Peru. These products are used as ingredients in feed for farmed fish and other animals, as well …

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