**2. Dolphins in the maritime area**

The species conservation effort should be a concern with ecological, behavioral, population, and species diversity. Among the mammal Irrawaddy dolphin, Indo-Pacific Humpback dolphin, Bottlenose dolphin, Spotted dolphin, Spinner dolphin, and Rough-toothed dolphin are present in the maritime area of Bangladesh in **Figure 2**. Only Ganges river dolphins survive in the freshwater, coastal water, and the mouth of the Ganges at Sundarban area.
