author(s)
Shyam Prasad Mamidala, Balakrishna Ch, Yeshdas B, Ravinder B, Mahesh R, Bhanu Prakash Ch, Suresh Kummari and Rajender B

abstract
Microorganisms had a pivotalrole in the aquatic environment by involving ecosystem productivity with relevant to the food chain from the primary producers to and flag end consumers to decompose the detritus. And also plays an important roleconcerning nutrient cycling, the nutrition of the cultured animals, oxygen production, digestion, water quality, disease control with the introduction of live useful microorganisms, and reduce the environmental impact of the effluent by natural mechanisms through Biofilters, Biofilms and Bioremediation process. The present review elevates the importance of microbes how they were champions in recycling, food web formation and how improves the healthy aquatic ecosystem.