The freshwater fishes of Turkey have been studied for more than 150 yr. However, a nation-wide inventory of freshwater fish occurrences in all transboundary river basins (Euphrates–Tigris, Coruh, Kura–Araks, Maritsa and Orontes) has been neither studied nor published. This work is the first extensive study of the composition and biological characteristics of the freshwater fish fauna of the transboundary rivers in Turkey, with special reference to the native and non-native status of species, and the spatial patterns of species e.g., abundance category, endemism, main threats, movement patterns, habitat guild, feeding guild, and reproductive guild. It is determined that a total of 184 fish species in 25 families (including 15 species which are not native, and 30 species are considered as endemic) live in the transboundary river basins in Turkey. Of the 184 fish species: 19 species are abundant, 57 species decrease, and 101 species are data deficient based on IUCN Red List (International Union for Conservation of Nature and Natural Resources). One of the main threats to freshwater fish occurrences in all transboundary river basins are dams. Most fish species in the area are threatened by dams, water extraction, and habitat degradation.

土耳其的淡水鱼类已经研究了150多年。然而，关于跨界河流流域（Euphrates–Tigris，Coruh，Kura–Araks，Maritsa和Orontes）的淡水鱼发生的全国清单尚未得到研究或发表。这项工作是对土耳其跨界河流淡水鱼类动物区系的组成和生物学特征的首次广泛研究，特别涉及物种的本地和非本地状态以及物种的空间格局，例如丰度类别，地方病，主要威胁，运动方式，栖息地公会，进食公会和生殖公会。经确定，土耳其的跨界流域共有25个科目中的184种鱼类（包括15种非本地鱼类，其中30种被认为是地方性）。在184种鱼类中：根据IUCN红色名录（国际自然和自然资源保护联盟），数据丰富，有19种，减少了57种，有101种缺乏数据。在所有跨界河流域，淡水鱼的主要威胁之一是水坝。该地区大多数鱼类受到水坝，水提取和栖息地退化的威胁。