[Zbrafish] infection

[Steven Waldron]

Greg,
It could be a pathogen but while you are awaiting diagnosis I would try 
to rule out some other variables...the symptoms described sound 
suspiciously like an acute toxicity effect, maybe from ammonia poisoning 
or gas-bubble disease.  Do an ammonia test and check your sumps for the 
build-up of excess fish waste (do you use a gravel based biological 
filter?). Also, check the intake of your pump for leaks. If the pump is 
drawing air and the water is super-saturated with gas, your fish could 
be getting the "bends" and will exhibit all the symptoms you describe.
best,
Steve Waldron
Wong Lab, University of Washington