# Atlantic bluefin tuna migration in Turkish waters > Live situation record from CLSTR: https://clstr.news/situations/atlantic-bluefin-tuna-migration-in-turkish-waters > Updated: 2026-09-27T09:07:00.000Z. Sources: 12. Developments: 2. Atlantic bluefin tuna have been observed in large numbers throughout the Istanbul Bosphorus, the Golden Horn, and the Izmit Gulf. Experts, including Associate Professor Taner Yıldız, suggest this represents a revival of a century-old migration route rather than the discovery of a new habitat, noting that historical records from 1913-1914 show significant tuna sales in the region. While the migration is driven by the pursuit of prey such as mackerel and bonito, recent observations indicate that increased tuna activity in the Marmara Sea may be linked to environmental improvements. Associate Professor İsmail Burak Daban suggests that mucilage action plans and increased inspections have reduced marine pollution, supporting the growth of small pelagic fish populations that serve as a primary food source for the tuna. ## Claims - Sena Tunç is the only female fish master in Elazığ. (corroborated by 3 sources) - Tunç operates a fish sandwich business in the Mustafapaşa neighborhood. (corroborated by 3 sources) - The business employs only women. (corroborated by 3 sources) - Tunç prepares six different types of fish daily. (corroborated by 3 sources) - Tunç sources her fish daily from her brother's stall in the Covered Bazaar. (corroborated by 3 sources) ## Timeline ### 2026-09-27: Marmara Sea sees increased tuna activity amid reduced pollution Tuna activity is rising in the Marmara Sea due to reduced pollution and increased prey. Meanwhile, Marmaris hosts an international seafood festival, and Elazığ celebrates its only female fish master. 9 sources. https://clstr.news/cluster/sena-tun-becomes-elazs-only-female-fish-master ### 2026-09-09: Atlantic bluefin tuna reappear in Istanbul Bosphorus and Marmara Sea Atlantic bluefin tuna are reappearing in the Istanbul Bosphorus and Marmara Sea, signaling the revival of a historical migration route used over a century ago. 3 sources. https://clstr.news/cluster/atlantic-bluefin-tuna-reappear-in-istanbul-bosphorus-and-marmara-sea --- Cite as: Atlantic bluefin tuna migration in Turkish waters. CLSTR, https://clstr.news/situations/atlantic-bluefin-tuna-migration-in-turkish-waters