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@@ Introduction: Frequency of all kinds of natural hazards has increased in the last two decades. These natural hazards have killed thousands of people and affected millions of people. With the development of space technology, information about the land, ocean, atmosphere and meteorological parameters can be routinely available which will help scientific community in getting information about the damage from all kinds of Natural Hazards and also one can get information about early warning of an impending natural hazard. On 26 December 2004, the strong earthquake off northern Sumatra coast (Indonesia) produced the largest trans-oceanic tsunami in over 40 years; it killed many people in recorded tsunami history and shifted Andaman Nicobar islands (Hopkin, 2005a, 2005b; UNEP, 2005; Gahalaut et al., 2006; Jade et ah, 2006). This paper analyzed the influences of Indian Ocean tsunami on marine ecosystem.