The bottlenose dolphins (Tursiops truncatus) inhabiting Galveston Bay, Texas are estuarine sentinels and a research priority for federal natural resource managers. While bottlenose dolphins are commonly found in estuaries and coastal areas along the Gulf coast, the Galveston Bay estuary is a unique and challenging habitat due, in part, to drastic salinity fluctuations, fishing pressures, and heavy industrialization that has led to the presence of high contaminant levels. The Galveston Bay Dolphin Research Program (GDRP) conducts long-term monitoring to understand the population dynamics and effects of anthropogenic threats on the local dolphin population. This information is vital to inform management decisions and conservation actions targeted for this long-lived protected species. The GDRP has conducted continuous monitoring since 2014 through a variety of boat-based methods, including photo-identification (photo-id) surveys, and remote biopsy darting. We have completed over 350 boat-based surveys covering over 29,000 km and sighted over 14,000 dolphins. To date, we have cataloged over 1,000 distinct individuals and collected 56 live-animal tissue samples. Through the evaluation of site fidelity of dolphins in the upper region of the Bay, the GDRP has identified a resident dolphin population of approximately 200 individuals that are likely exposed to high levels of contaminants and interact frequently with commercial fisheries and ship traffic. This continuous dataset enables a multi-disciplinary approach to address key questions and facilitates the use of innovative techniques. Additionally, this research strategy provides baseline data that is critical to understanding population response to future environmental disturbance and for making science-based management decisions.