Abstract
In Lake Tanganyika, 137 specimens of the mussel Moncetia lavigeriana were collected from August to early December 1983 and their shell length, sex and reproductive conditions were examined. Gravid females were observed during the present study. They have incubated 3000 to 22000 eggs in the inner gills. The larvae (glochidia) were found on the gills of fishes of 18 species. Among them, two predators on bivalves (Lobochilotes labiatus and Lamprologus tretocephalus) were the main hosts of glochidia. There may be a kind of symbiotic relationship between fish and mussel as fish feeds on mussels but rears their larvae.
