Caridina
Caridina is a genus of freshwater atyid shrimp. They are widely found in tropical or subtropical water in Asia, Oceania and Africa. They are filter-feeders and omnivorous scavengers. They range from 0.9–9.8 mm ("C. cantonensis") to 1.2–7.4 mm ("C. serrata") in carapace length. Taxonomy and species. There is evidence for hybridization between sympatric taxa, requiring care when interpreting molecular phylogenetic analyses that do not use a large number of specimens. The genus "Caridina" includes the following species: