This study examines the plight of hilsa fishers in Bangladesh, grappling with challenges such as poor market access, scant capital, and shrinking fish stocks. This situation led to the seasonal dadon loan system, which provides immediate financial aid but often traps many fishers in a relentless debt cycle. We adopted a socio-ecological systems (SES) framework to examine the interconnected social and ecological dynamics of the hilsa fishery industry. Using a blend of quantitative surveys and qualitative interviews, we assessed the impact of the dadon loan system on small-scale fishers across four fishing locales in Bangladesh. The results indicate that the dadon loan system is a temporary financial prop for fishers but perpetuates debt cycles and curbs long-term financial security. Factors such as restricted access to formal credit, high fishing costs, and inadequate government support drive this system. This study identifies potential alternatives, such as government-backed loans, community finance schemes, and the promotion of alternative livelihoods, which could reduce reliance on the dadon loan system and improve fishers’ socioeconomic conditions. Implementing these strategies may dismantle the debt cycle, boost fishers’ welfare, and strengthen the socio-ecological resilience of fishing communities.