The highest altitude occurrence of Salariopsis fluviatilis (Teleostei: Blenniidae) detected so far: Kızılırmak River-Black Sea basin (North of Türkiye)

A resident population of Salariopsis fluviatilis was discovered in the upper basins of the Kızılırmak River, the largest river in Türkiye. Samples with total lengths ranging from 22.24 mm to 90.86 mm were collected and examined. This discovery was the highest altitude record of both the genus Salariopsis and the species S. fluviatilis, with an altitude of 753 m. It was also reported for the first time from the Kızılırmak River-Black Sea basin (North of Türkiye). The obtained data were compared with records from different studies.