The anchor worm is a common pest of fish. Despite its name, this pest is actually a crustacean and is a very destructive creature. The head of the anchor worm embeds into the flesh of fish (the host) causing unsightly lesions and growths.
To control this pest, the host fish needs to be caught and held in a wet cloth. Then touch the anchor worm (parasite) with a brush dipped in ordinary household paraffin. This will kill the anchor worm which can then removed with tweezers. It is advisable to the treat the open wound with a mild disinfectant solution.