ShuiEro ... from vague up to sometimes ;) crystal clear drop by drop ...

In the present paper, we compile the newest data to give a description of the Amur [Heilongjiang] River fish diversity. Based on our data, the native fishes inhabiting or entering the Amur drainage are at least 123 species belonging to 23 families. Cypriniformes are the main component among which the Gobioninae is the most numerous (19 species in 11 genera) subfamily. Then, with 11 species and 5 genera, the Salmonidae is the second largest family. The Amur fishes (11 marine and occasional visitors excluded) can be grouped according to their general distribution as endemic 0 6 species), spawning endemic (3), endemic or Manchurian (10), near endemic (5), Manchurian (25), Palaearctic or Manchurian (2), northern (17) and southern (34). Two monotypic genera, Pseudaspius and Mesocottus are the most peculiar elements of the Amur River, shared with only neighboring coastal rivers. Based on the distribution pattern of the Amur fishes, the Amur drainage can be divided in five zoogeographic units: Argun River Districts, Shilka River District, Middle Amur District, Sungari River District and Lower Amur District. These District are described in terms of their topography and fish taxa composition. The systematic status and nomenclature of all species have been reevaluated and an updated annotated list of taxa is presented.