The drugs obtained from marine organisms which are being conventionally used like Shark & Cod liver oil, Sodium alginate, Agar-agar, Chitin etc.
Marine organisms are potential source for drug discovery. Life has originated from oceans and contains highly ecological, chemical & biological diversity starting from micro organisms to vertebrates. This diversity has been the source of unique chemical compounds which hold tremendous pharmaceutical potential.
Majority of the marine natural products have been isolated from sponges, coelenterates, tunicates, opisthobranch echinoderms and a wide variety of marine microorganisms in their tissues.