Elasmobranchs (i.e. sharks, rays, skates, and sawfish) are specialized to their specific environments and facing environmental crises. Many of these populations have experienced severe declines over the past few decades due to significant threats from overfishing, habitat degradation, and climate change in Bangladesh coasts that are removing their ecosystem role. OiLAB has initiated a monitoring program to address these challenges and ensure the long-term health and sustainability of Elasmobranchs species along the Bangladesh coast. Particularly, OiLAB is collecting the time series data of sharks and rays that were caught and landed on St. Martin’s Island MPA. Moreover, the present study is investigating the environmental connections and ecological interactions of elasmobranchs with benthic invertebrates, fishes, seaweeds, and other living and nonliving components within the marine protected area (MPA) of St. Martin’s Island. By examining the intricate relationships between these species and their environment, this study aims to assess how elasmobranchs adapt to seasonal changes and interact with key components of the monsoon dominated tropical marine ecosystem. Additionally, this research is exploring the dietary preferences of elasmobranchs and compares these with other known distribution sites to highlight potential regional dietary variations. OiLAB is also evaluating the conservation status of elasmobranchs around St. Martin’s Island, focusing on current protective measures and their effectiveness in ensuring the sustainability of these vulnerable species.