According to the TPWD site, Lake Fork was stocked with Florida largemouth bass, blue catfish, channel catfish, coppernose bluegill, flathead catfish, redear sunfish, and a few sucker fish.
The site did not mention that Lake Fork is full of yellow and white bass. It also has the state record for largemouth bass, crappie, and bowfin (grinnel).
For the past 15+ years, the average number of Florida bass fingerlings was over 600,000 per year. Since 2006, there have been several thousand Sharelunker fingerlings stocked every year.
See http://www.tpwd.state.tx.us/fishboat/fish/action/stock_bywater.php?WB_code=0433 for specifics.