Antimicrobial Activity of Sponge Associated Macroorganisms Against Fish Pathogen

2 Abstract: Antimirobial potential of sponge associated microorganisms have been dealt for a couple of centuries, but the bioactivity of sponge associated macroorganism have not been attempted so far. The present study was carried out to find out the sponge associated macroorganism and their bioactive potential against chosen fish pathogens. Marine sponges were monthly collected by scuba diving at sampling station viz Thondi. Five sponge samples viz., Clathria vulpine, Stylissa carteri, Hyattella intestinalis, Clathria indica and Haliclona grant were collected from Palk Starit region. Associated macroorganism viz., Hypnea valentiae sponge and Nereis sp. The bioactive potential of sponge extract and associated macrofaunal and floral extract was showed that, the crude extract from Clathria vulpine showed maximum average zone of inhibition (10.25mm) against Bacillus subtilis and Vibrio harveyi. Among the assoiated macroorganisms, the seaweed Hypnea valentia and Nereis sp showed maximum average zone of inhibition (9.25 and 7.5mm). The overall antimicrobial activity assessed from the above results indicated the presence of active constituents in the extractions of sponges and assoiated macroorganisms which can be exploited for the production of lead molecules which are of use in pharmaceutical industry.

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