The horizontal and vertical movements of two large sunfishes (TL >200 cm) were investigated using popup satellite archival tags off the eastern coast of Taiwan in 2017-2018. One tag on Mola mola popped up at the South China Sea after 148 days and another on Mola alexandrini was recovered after deployment of 18 days. Most probable tracks estimated by Kalman filter with matching sea surface temperature, suggested that the tagged Mola mola moved in a northerly direction to the East China Sea, and then went eastward and southward to eastern Taiwan. Then it moved west to the coast of Miyakojima and Okinawa Island, Japan. During these movements, the fish experienced thermal fronts and moved against the prevailing current. Both fish exhibited distinct diel oscillations in their vertical movements. During daytime periods, tagged fish spent most of their time (> 72%) below the thermocline and sometimes ascended to the surface, and experienced water temperature of 12-16 ̊C. During nighttime periods, the vertical movements were confined to the mixed layer with water temperature ranging from 18-24 ̊C. Depth patterns were different between December to mid-January and mid-January to May, during which descents were correlated with the strength of the thermocline. These movements suggest that sunfish can shift their horizontal and vertical patterns in response to changing ambient water temperature, thermocline, and prey availability.