Stone flounder eggs were abundant in the central area of Sendai Bay and their larvae are thought to be transported inshore by warm offshore waters entering the Bay through its central part. Settling larvae showed behaviour related to selective tidal-stream transport. This also plays an important role in avoiding predation by diurnal piscivorous fishes and nocturnal benthic sand shrimp. Settling flounder were abundant in deeper waters in February, and with inshore movement, densities peaked in late March in estuaries.