Core tip: A scientific recommendation has sounded the highest level of alert for the most important trade of high seas fish globally. On September 30, the International Council for the Exploration of the Sea (ICES) issued a notice recommending that the allowable catch of Atlantic mackerel in the Northeast Atlantic should not exceed 174,000 tons in 2026. Compared to the scientific recommendation for 2025 (577,000 tons), this figure has dropped by a steep 70%, and is even a staggering 77% lower than the total quota of 760,000 tons set by coastal countries this year.