With this initiative BioFresh brings together all distribution data of all troglobiotic subterranean fishes (Cavefishes) of the world. These data will be made publically available through the BioFresh data portal and in the BioFresh Global Atlas of Freshwater Biodiversity. As of September 2012 there are 174 described species of troglobiotic (i.e. obligate) subterranean fishes across the world. This project aims to provide a geo-referenced site scale data for every known population for every described troglobiotic fish species.