OILAB has been conducting various researches focusing the changes in ecological settings for: (1) hermatypic and ahermatypic corals; (2) saltmarsh; (3) seagrass; (4) mangrove; and (5) benthic ecosystems, located in the northern Bay of Bengal. OILAB has launched a series of habitat monitoring programs in the offshore St. Martin’s Island, which is surrounded by a sedimentary rocky reef and has been colonized by hermatypic and ahermatypic corals, and calcareous algae. The lab is also monitoring the saltmarsh and critical seagrass habitats in central and south-eastern coasts for understanding their ecological roles and interactions among their associated species. The lab successfully conducted field research to reveal the environmental functions of the mangroves in south-east coasts that communicate the values of goods and services. The lab has an extensive monitoring program for the mighty Sundarbans, which is the largest mangrove forest in the World and enlisted as UNESCO World Heritage Sites. Recently the lab has completed a research cruise program in the Sundarbans mangrove forest for season 2023-24 that covered over 250 km of waterways and 30 monitoring stations. This research is going to address the changes in aquatic and terrestrial habitats due to climate change and man-made pressures around the Sundarbans areas along with their effects on faunal and floral biodiversity.