（ were studied and research objects were taken from Zhoushan Fishries Research Institute in April 2009. Microscopic observation was performed on the growth of the otolith during the embryonic development of artificially fertilized eggs and the formation of the first daily growth increment on otolith of larvae. The initial daily growth increment in otolith was formed on the second day after hatchingand continued on a daily schedule under normal conditions. Daily age of otolith were shown by daily growth increments ，and on the 8^{there was a second checkcalled first feeding check. After biological measurements of the samplesthe sagittal otoliths were removed from the fish and sections were made to examine their sizesnumber and widths of daily growth increments by light microscopes. The longest radius L s =18.146r_l +1.988 2.}