Anemone Fish Disease
This ciliated protozoa. known as Brooklynella hostilis , infects both the gills and skin of fish. Two of the most diagnostic symptoms of this infection are the sloughing of protective skin cells and increased secretion of mucus. The infected fish may also I become lethargic, exhibit respiratory distress, stop feeding and display areas of discolored skin on the body.
Like Uronema , this parasite feeds on the tissue and blood of its host, and causes osmoregulatory distress as it opens portals for the loss of body water to the marine environment. The gill tissue can also be damaged by the parasite's feeding activity. Unlike Uronema , anemonefish disease must have a host to survive.
Brooklynella usually becomes apparent when fish are experiencing unusual amounts of stress. For example, it is often seen in young anemonefish that are crowded in wholesale facilities or retail stores. It gets its name from the fact that it regularly infects anemonefish, but it will parasitize other fish species, as well (e.g., it is a common seahorse parasite).
One of the most commonly employed treatments for Brooklynella is to use a combination of formalin and malachite green. However, care should be taken with fish that have severe skin damage, as this will make them more sensitive to formalin treatment (it could poison them). Malachite green can be used on its own at a concentration of 0.10 part per million (ppm
) (Blasiola, 1992). Once again, the best treatment option is to lower the saliniity. This will eradicate the parasite and help reduce osmoregulatory distress in your fish. Note that copper is not an i effective treatment for this parasite.