The pangolin scales, concealed in 76 bags on a speed boat, were intercepted by police in waters off Zhongshan City on April 10.
A suspect, identified only by the surname Feng, was detained.
Pangolins are under second-class state protection in China. Their scales are believed to have medical qualities.
Those who illegally catch, kill, buy or sell wild animals on the state’s protection list face a maximum penalty of over 10 years in prison and fines.