The battle against Lake Sorell carp looks almost won.
Inland Fisheries believes there are now fewer than 50 of the introduced pest fish left in the Central Highlands lake.
The service said it removed 107 carp from the lake in the 2017-18 season.
It said it had removed 41,452 carp from the lake during its long-running eradication program which started in 1995.
â€śBy continuing to use a range of fishing techniques, the aim will be to finish off the majority of carp this coming spring,â€ť Inland Fisheries said in its carp management program annual report for 2017-18.
â€śIn order to achieve this,Â optimal environmental conditions are required to draw the remaining fish into the shallows, where they become vulnerable to our fishing gear.
â€śIn addition, there will also be an equally important emphasis on stopping spawning.â€ť
Nearby Lake Crescent appeared to remain carp-free, afterÂ continued annual sampling and monitoring.
Inland Fisheries said no carp had been caught there since 2007.
ItÂ is now managed as a trout fishery.
Lake Sorell was onceÂ one of Tasmaniaâ€™s most popular fisheries, andÂ attracted half of the stateâ€™s anglers each season.
The IFS hopes it will again become a popular fishery whenÂ carp are eradicated.
It said noÂ spawning had been detected in Lake Sorell during the season, andÂ that was a key to eradication.
It said the 107 carp caughtÂ averaged 763 grams.
â€śThe constant and intense fishing pressure has suppressed the carp size, and gonad analysis indicates that there are serious issues with a population that is struggling to remain viable,â€ť it said.