Open mouth

How long has he been doing this? Luna

 

He hid behind the rocks for a couple of days about a week ago, still came out when i fed them, but then hid again when he had his fill, then after a couple of days he got over his phobia and now swims all over the tank, but with mouth and gills rapidly opening & closing, few days later, just yesterday i noticed tears in his fin? seems he is getting worse?hes been in there for about 3 weeks...

Can't put it down to nothing because all seems well,parameters great. just clueless...

Oh & yesterday, may i add i did notice the chalk goby's tail-fin, fanned out a bit, like worn, i fear there may be something brewing...

 

Doesnt seem to be O2, sounds more like some kind of parasite or such. If you have other fish in there, I would get him out. Luna

 

No can do, got no quarantine, and with the amount of crooks, crannies , caves would take forever to catch, so if it gets a hold of him i will snatch him out while he is weak and flush him down the bog or freeze him, or chuck him out in the rain, or....