The mangrove forests on the active delta of Indian Sundarban are a unique biosphere and a declared world heritage site. It prevails with the dynamic features of a tidal estuary along with special floral diversity of mangroves. The estuaries, the adjoining mangroves, and the brackish water ecosystem sustain a very rich aquatic, terrestrial, aerial and arboreal faunal biodiversity. Mangrove areas are an important media for transport of offshore nutrients, as they are the exporters of large amount of plant and animal detritus. Ever increasing destruction of mangroves and simultaneous conversion of land into different land use patterns, coupled with indiscriminate contamination with different xenobiotics of water and soil by various means are affecting the ecological condition of this special ecosystem. Ecological Evaluation of Estuarine Indian Sundarban is the result of an extensive study in Indian Sundarban considering its unique estuarine mangrove ecological status.