Introduction
Actinomycetes are filamentous, antibiotics producing bacteria. They are found in freshwater and marine water habitats[1]–[3]. The dominant actinomycetes Micromonospora can be isolated from aquatic habitats such as streams, rivers, lake mud, river sediments, beach sands, sponge and marine sediments[4],[5]. Several novel bioactive compounds were discovered from aquatic actinomycetes, for example rifamycin from Micromonospora[6]; salinosporamide-A, an anticancer metabolite from a Salinispora strain[7]; marinomycins from Marinophilus sp.[8]; abyssomicin-C from Verrucosispora sp. and marinopyrroles from Streptomyces sp[9],[10].