Birger wrote:Just wondering what brought you to this conclusion.

Birger

It was caught from North China while Tachysurus fulvidraco is only found in South China.It has not be decided if Tachysurus sinensis should be seperated from Tachysurus fulvidraco and classified as a neotype.

Remenber this little cat? http://www.planetcatfish.com/forum/view ... =9&t=39004
I thought that it is Tachysurus fulvidraco but now it seems to be T. sinensis.It does not matter.The most important part is that it has grown from 6cm to 8cm.

If the four others are in the same tank and look and feed well, then there is less worry. This looks as if he is half-paralyzed, that is his brain and/or central nervous system is affected. Could be bacterial, could be parasitic. Of course, I am just throwing wild guesses; really, it's hard to say ...

Welcome to the Planet! It looks gruesome. Please, provide water parameters - NH3, NO2, NO3, pH, and temp. Indicate what test kit you use. Is the aeration most certainly sufficient? Ideally, here is the wish-list of the things that need to be conveyed to the forum when asking for medicinal help ...

I bought this guy three days ago and I found nothing wrong in the begining.After one day,this one became active and always swam near the water surface.I thought it was caused by low oxygen in water or it had parasites in its gill.So I have used methylene blue to treat it for two days.It is still ...