Barbus ida Common name. Biga barbel. Diagnosis. Distinguished from other species of Barbus in West Asia by: ○ 56−61 total lateral-line scales / ○ 9–10 gill rakers / ○ 39−40 total vertebrae / ○ head length 24−27 % SL / ○ lower lip with a median pad / ○ numerous irregular dark-brown blotches on back, flank, and head / ○ dorsal origin slightly in front of vertical of pelvic origin / ○ last unbranched dorsal ray 41–55 % ossified / ○ posterior margin of dorsal straight or slightly convex / ○ anal longer in female than in male. Size up to 160 mm SL. Distribution. Türkiye: Gönen and Biga drainages on Biga Peninsula. Habitat. Headwaters of streams and small rivers with fast, clear, well-oxygenated water and gravel substrate. Biology. No data. Conservation status. LC; has a small range with stable populations. Remarks. Barbus ida occurs locally sympatric with B. tauricus. It usually inhabits small headwater streams, whereas B. tauricus is found in larger, slow-flowing rivers. Further reading. Güçlü et al. 2021 (description).

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 100, DOI: 10.1515/9783111677811, http://zenodo.org/record/17881367