Fungal gill disease (<i>Branchiomycosis</i>)


Spasms - convulsions
Fish appears to be having a fit, jerking and twisting abnormally.
Respiration rapid
Fish is breathing very fast, much faster than is normal.
Dissolved oxygen low < 6mg\L
Most aquatic fish in freshwater or seawater require oxygen levels above 6mg/L. Check oxygen level.
Listless and lethargic
Fish moves very lazily in water, much less than normal, lacks interest.
pH water low <6.5
A few species of freshwater fish (Discus) can tolerate lower than 6.5 pH.  If lower than this and problems, suspect this a possible cause.


Infection of gills with a fungus. Fungus grows in gill epithelium and suffocate fish.


Caught early the problem can be cured. If fish has been infected for a long time, prognosis is doubtfull.


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