Abstract
            
            The potential of the marine environment to produce candidate compounds (structures)
               as leads to, or even direct drugs from, has been actively discussed for the last 50
               or so years. Over this time frame, several compounds have led to drugs, usually in
               the area of cancer (due to funding sources). This review is designed to show where
               there have been successes, but also to show that in a number of disease areas, there
               are structures originally isolated from marine invertebrates and free-living microbes
               that have potential, but will need to be “adopted” by pharmaceutical houses in order
               to maximize their potential.
            
         
         Key words
marine-sourced drugs - clinical trials - cancer - HIV