Crustaceans are carnivorous, scavengers, deposit feeders, filter feeders and omnivorous. The crustaceans forms a
major component of the benthic fauna with highest density and biomass in mangrove areas (Tirmizi et al., 1983) .Earlier
Mustaquim and Rabbani (1976) studied portunid crab species from Karachi coast. There is a lack of macrobenthic faunal
studies in Pakistan. Keeping in view, the importance of mangrove areas as a nursery ground, seasonal abundance and
occurrence of crustaceans has been studied in this paper from Sandspit mangrove area.