Scientific introduction
Henri Milne Edwards established Caridina in 1837. It is a highly diverse atyid assemblage of freshwater and related amphidromous shrimps. Molecular phylogenies show that historic Caridina classification does not form an unproblematic single monophyletic species tree; substantial revision remains necessary.
Early diversity and natural history
Wild Caridina occur across distinct Asian, Australasian and African freshwater systems. Different reproductive modes shape dispersal; soft-water stream Bee shrimp, Lake Matano cardinal shrimp, and Amano shrimp with salt-tolerant larvae cannot be combined into one husbandry model. IUCN assesses Caridina dennerli as critically endangered and possibly extinct in the wild.
The bee-shrimp and tiger-shrimp era
Crystal Red selections were promoted through Japanese and German aquarists. Hisayasu Suzuki is associated with selective breeding of red Bee lines; Frank and Carsten Logemann documented early European captive breeding and developed K grading conventions. A 2014 primary taxonomic study described Caridina logemanni, C. mariae and C. conghuensis.
Modern designer lines and recent science
Breeders use Bee, Tiger, Taiwan Bee, Tibee, TaiTibee, Pinto, Galaxy, Fishbone and Boa terminology. These are trade, selection or crossing histories rather than automatically valid taxonomic names. A 2026 southern Thailand revision reported 18 distinct molecular lineages and formally described five new Caridina species; this shows why commercial-line names must not replace field taxonomy.