1. Oceanography
          Multidisciplinary researches in various fields of oceanography; namely, physical, chemical, geological and biological oceanography are carried out mainly in the estuarine and coastal areas, remote sensing and mathematical modelling techniques are also used.

2. Marine Environmental Chemistry
          Environmental quality of water, and natural resources is monitored. Several case studies of marine environmental assessment and impacts have been carried out both in the field and in the laboratory. The epartment takes an active role in the ASEAN-Canada Marine Pollution Monitoring and Marine Environment Quality Criteria Working Group.

3. Aquaculture
          Researches on cultivation of aquatic animals with emphasis on economically important species such as banana prawns, tiger prawns, oysters, green mussels and others are going on. Environmental quality and its impacts on aquaculture, predators, parasites, diseases of cultured species are frequently monitored.

4. Mangrove Ecology
          Various aspects of mangrove ecosystem such as tide and current, nutrient dynamics, marine flora and fauna community, water quality, soil chemistry, sediment transport and biogeochemical processes are being studied. Several staff members participate in the UNESCO Mangrove Research Programme. These researches provide some guidelines for the mangrove ecosystem management plan.

5. Coral Reef and Seagass Ecology
          Two themes of coral and seagrass researches are being emphasized: Species compositions and the inter- and intra-specific relationship in the coral reef and sea-grass communities; and the distribution and environmental factors affecting the distribution of coral reefs and seagrass beds. Impacts of sediments on these ecosystems are also studied.

6. Harmful Algal Bloom
          A phytoplankton laboratory emphasizing on this aspect is in operation. Department staff work in coordination with other specialists from the Department of Fisheries and the Veterinary Science Faculty, as well as several scientists from abroad.

7. Genetics of Thiamine Organisms
          Various aspects on genetics of marine species with special emphasis on molluscs such as oyster (Saccostrea spp., Crassostrea spp.,) and abalone (Haliotis spp.) are explored. Both basic and applied genetics are of major concerns. An understanding on relationships between genetics, physiology and biochemistry of marine organism are longterm objectives. Conservations of biodiversity (genetic diversity) of marine organisms are also emphasized.

8. River Inputs to the Sea and Mussel Watch Projects
          The marine chemistry group plays an active role in these two projects of the IOC/VVESTPAC Marine Pollution Research and Monitoring Programme since 1980. Several major rivers of Thailand have been studied on their geochemical behaviours and watershed influences, etc. The monitoring of economically important bivalve quality has been done since 1979.