01/18/2021
Even the best cared for fish can develop problems or carry parasites and pathogens from the supplier. This charming Ranchu fancy goldfish, Gregor, is a AAA class ranchu, however even a fish of his pedigree can carry hitch-hikers.
Anchor-worm (Lernaea) are external parasites (copepod crustaceans not actual worms) which embed themselves and grow out of the skin of the fish. They can be quite traumatic and illicit an inflammatory reaction at the site as red itchy welts out of which the parasite feeds and eventually distributes her eggs (all anchor-worms that are visible on fish are females who have mated with males in the water column in a copepod stage).
Gregor and his tank mates Archie and Amber started showing small red spots which quickly developed into inflamed welts with small translucent strands protruding from them. We identified the issue as Anchor-worm, most likely brought into the tank when Gregor was introduced. Gregor showed some abnormal behaviors such as hiding away, lethargy, and mild respiratory distress most probably a result of stress and discomfort from anchor-worm. Since adult Anchor-worm are not susceptible to most available treatment options, the client was willing and able to remove the visible parasites using tweezers and hydrogen peroxide. The tank was treated with two courses of Cyromazine solution. No adult anchor-worm have been seen since the second course of treatment.
The three ranchu are back to their old photogenic selves, and their owner, as well as VAS, could not be happier!
*All photos taken by owner. All information and photographs posted with permission of owner/client.*