Freshwater biology - Wikipedia

Fresh water - Wikipedia

Limnology - Wikipedia

Achirus achirus - Wikipedia

File:Invasion biology in a broader context that includes

Freshwater Ecosystem

River ecosystem - Wikipedia

Freshwater ecosystem - Wikipedia

Aquatic ecosystem - Wikipedia

River ecosystem - Wikipedia

Cichlid - Wikipedia

Water Definition and Examples - Biology Online Dictionary

Frontiers Orange Chromide, Pseudetroplus maculatus (Bloch., 1795