The main purpose of this project is try to realize the distribution status and the numberof the mackerel and scad larvae in the waters of Taiwan, and its geographic and spacialdistribution whether various with the seasonal changes or not are also investigated in thisplan. All the data collected and analyzed are given to the government as a mackerel andscad fishery police reference. A total of 34 operating stations with Bongo net at verticalspeed of 20 m per minute to collect the larvae, CTD are also planed to conduct torealize the relationship between the larvae and fishing ground environment in thecomming year.