I think he had TB involving the bones of the jaw and spine and the others
have not shown it yet because their immune systems are holding it in check.
Keep up the water changes and keep them on the cool side of their
temperature tolerance range as well as feed low fat and higher vegetable
content diet and they may not express the overt signs.
Regards,
Bruce.
bhansen at ozemail.com.au
----------
> From: PJ Jellison <jellison at ceps.nasm.edu>
> To: rainbowfish at pcug.org.au
> Subject: [RML] Wha'happened to this Praecox?
> Date: Thursday, 1 January 1998 3:38
>
> Hello all, and a Happy New Year to you!
>
> I have a question for your collected wisdom. We have a
> 55-gal tank with 6 Praecox rainbows in it; all of whom have
> seemed healthy and "happy" for the past six months. Then,
> one of the rainbows started to change. The best way I can
> describe it is to say that he got "jowly" -- his lower jaw
> seemed to widen and lengthen, and hook (similar to how
> a male salmon gets on breeding migration). We put him
> in the quarantine tank. He continued to eat, never clamped
> his fins, but progressively got more and more deformed
> (not just the head, but his spine curved also). Finally his
> respiration rate increased and he succumbed.
>
> Fortunately (at least so far) none of the others has developed
> anything like this -- but we're clueless about what this is.
> Looked in several of our "fish health" books but couldn't
> match it. To me it at first suggested some sort of nutrient
> deficiency but none of the other fish were affected.
>
> Any guesses?
>
> Regards,
> Pat