Manipulation through invasion is a major problem inmost of the port areas in recent world. Mongla is animportant sea port that has accomplished theactivities like import and export of various goodsinside and outside Bangladesh. The process not onlyinvolves the moving of goods, it also carries theinvasive species purposely or accidentally whichinvading to the new location of the Mongla port areathrough exploration and colonization with varietiesdiversity and scale. The research reveals thatballast water of cargo ships is one of the means ofinvasion of the coastal waters of Mongla...