Relative abundance trends for common thresher, shortfin mako and blue shark in the California-based drift net fishery have been investigated using data from fisher bridge logs, onboard observer records, and an NMFS fishery-independent relative abundance survey. Preliminary results indicate that local thresher shark stocks may be rebuilding after being overfished during the 1980s. Trends in relative abundance of shortfin mako and blue sharks show a slightly decreasing trend in abundance along with decreased fish size in the catch over the same period but the extent to which this has been influenced by shifts in environmental conditions and fish distributions is not known.