Alburnus demiri Common name. Eastern Aegean bleak. Diagnosis. Distinguished from other species of Alburnus in Central Anatolia, Aegean, Marmara, and Black Sea basins by: ○ 43–46+3 scales in lateral line / ○ 13–14½ branched anal rays / ○ 9 scale rows between lateral line and dorsal origin / ○ 18–21 gill rakers / ○ ventral keel exposed for 6–9 scales in front of anus / ○ caudal peduncle depth 10.5–11.1 % SL. Size up to 90 mm SL. Distribution. Türkiye:Tahtalı and Küçük Menderes drainages. Habitat. A wide range of moderately fast-flowing streams and rivers with gravel substrate. Reservoir populations migrate to tributaries to spawn. Biology. Spawns May–June. Conservation status. EN; appears to be declining within its very small range. Further reading. Özuluğ & Freyhof 2008a (description); Mangit & Yerli 2018 (distribution).

Published as part of Freyhof, Jörg, Yoğurtçuoğlu, Baran, Jouladeh-Roudbar, Arash & Kaya, Cüneyt, 2025, Handbook of Freshwater Fishes of West Asia, GmbH, Berlin / Boston :De Gruyter on page 314, DOI: 10.1515/9783111677811, http://zenodo.org/record/17881367