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An early life stage individual-based model of chub mackerel (Scomber japonicus) (IBM-CM) is developed and coupled with the East China Sea (ECS) unstructured grid Finite-Volume Community Ocean Model (FVCOM). Using this coupled physical-biological model, we examined the influences of regional physical processes on the dispersion and survival of chub mackerel larvae in the ECS under climatological spring–summer temperature and circulation conditions with and without the inclusion of short-time fluctuations of a typhoon. The model results show that the seasonal variability of regional circulation, vertical stratification, and mixing play critical roles in larval dispersal and abundance distributions during the early life stages. Sensitivity experiments suggest that under the same physical environment, the larval dispersal distributions and survival rates can be significantly influenced by the location of spawning …