Experiments on glochidiosis of the freshwater pearl mussel,Chamberlainia hainesiana, were carried out using the fry of four species of fish, namely Temminck's kissing gourami (Helostoma temmincki), striped tiger nandid (Pristolepis fasciatus), walking catfish (Clarius macrocephalus) and sand goby (Oxyeleotris marmoratus). The fry were exposed to four concentrations of glochidia, and the LE50values (the concentrations that killed 50% of the fry) were determined. The most resistant species wasO. marmoratus, which also gave the highest production of juvenile mussels. Juveniles appeared 18–27 days after infection.