Hi Gintu..these things are leeches and can attack fish as parasitic bloodsuckers. They attach to the skin of fish, especially around the mouth and gills, and feed on their blood. This can cause anemia, lethargy, and paleness in the fish. Leeches can also transmit blood parasites and viruses to fish,

SMH...sorry you were sold a bad batch of fish😭😢😭😢

why would you want to do that if is even one farm you shoud keep

I am so sorry don’t give up keep on keeping on you will make it

Gintu so much wasted energy! you need to bend some wire into a rectangle shape with a handle an make some nets with bigger holes than mosquito net. when the pond is lower to about 12 inches then dig a trench in the middle of the of the pond so the fish swim naturally yo it and get stuck an then use your rectangular net to pull fish out of the trench.