Among the recorded nine (9) naturally-occurring Macrobrachium species in Marinduque, there are 4 species with potentials for culture for their size, including M. australe, M. latimanus, M. lar, and M. latidactylus. These species are among the target species captured by local residents from the wild for domestic consumption and occasionally sold at the local market for extra income. This project is deemed to investigate some aspects of the reproductive biology of the freshwater prawn species, its fecundity, egg size, hatching rate and larvae survival rate in hatchery conditions with the hope that a new commodity for the local fishermen to produce can be identified, at the same time conserve and protect the remaining freshwater prawns in the wild.