Recent scientific research has focused on natural products and potential bioactive compounds that have possible health benefits beyond traditional nutritional value. Over billions of years, nature has produced these organic molecules, which have varied uses, some of which are yet to be determined. The discovery of new molecules can contribute to the development of basic scientific concepts, lead to valuable drug oriented compounds and suggest possible new pharmacological reagents. Newly discovered substances can even create new scientific fields. Progress in these fields often contributes to the betterment of humanity. Notable examples include the secondary metabolites from marine organisms, whose chemical structures are completely different from those of terrestrial organisms. Marine metabolites often have unique biological activities and thus deserve special attention.