Boring sponges of Zuari and Mandovi estuaries

A study of the boring sponges of the Zuari and Mandovi estuaries in relation to those in the open sea has revealed that the percentage of incidence of Cliona celata Grant and C. vastifica Hancock in the marine environment is rather negligible (3 and 2% respectively). But in the estuaries of these two major rivers the incidence of C. vastifica is more (8%) and the Oyster Crassostrea cucullata Born, formed in main target of this species. The distribution of C. vastifica in both these estuaries is more or less similar and occur throughout the year. But C. celata is found only during the summer months, in both the estuaries