Rasbora with sore? Or tumor? Or.....?

[BlueRaccoon]

THis seems to be pretty new. I just noticed it. It's growing out the side of the fish. It is not flat. It is pretty raised above the scales. It's like a lump coming out.....Thoughts on what this could be? Should I be concerned about my other fish?

 

[A201]

My guess is a virus, a Lymphocystis cyst. If so there's is no cure. The cyst will eventually burst, injecting a zillion virus spores into the environment. Not good.

The virus can spread to weak or injured tankmates.

Apparently the virus can be rendered dormant by the fish's immune system. The few cases of Lymphocystis I've dealt with did not have a happy ending.

 

[BlueRaccoon]

My guess is a virus, a Lymphocystis cyst. If so there's is no cure. The cyst will eventually burst, injecting a zillion virus spores into the environment. Not good.

The virus can spread to weak or injured tankmates.

Apparently the virus can be rendered dormant by the fish's immune system. The few cases of Lymphocystis I've dealt with did not have a happy ending.

Thank you for the info, A201. If this was your fish, what would you do?

 

[A201]

I would euthanize the poor guy.

 

[Fishfur]

Given that Trigonostigma spp. are Cyprinids, it’s highly unlikely to be lymphocystis because it’s never been seen in Cyprinids (or catfish either).

Lymphocystis itself typically runs its course and eventually goes away. So in most cases it would just be a waiting game - it’s virtually never fatal and when it is, it isn’t the virus itself that kills. Occasionally the lumps appear in very inconvenient places like the mouth or internally where their size is the problem.

Since these fish are Cyprinids, it’s possible that’s it’s some other viral issue, or a tumour or just possibly a cyst or abscess. Is it growing quickly?

It likely isn’t causing the fish much if any trouble at the moment, so I think I’d just keep an eye on it and see what happens with it. If it is growing fast or other symptoms appear, then it might be time to consider euthanasia.

 

[Caliban]

I had something similar to this happen on a Rasbora of mine, and I cured it with methylene blue. I did direct application every day, and within a week it completely vanished. It has not come back since.

 

[BlueRaccoon]

Given that Trigonostigma spp. are Cyprinids, it’s highly unlikely to be lymphocystis because it’s never been seen in Cyprinids (or catfish either).

Lymphocystis itself typically runs its course and eventually goes away. So in most cases it would just be a waiting game - it’s virtually never fatal and when it is, it isn’t the virus itself that kills. Occasionally the lumps appear in very inconvenient places like the mouth or internally where their size is the problem.

Since these fish are Cyprinids, it’s possible that’s it’s some other viral issue, or a tumour or just possibly a cyst or abscess. Is it growing quickly?

It likely isn’t causing the fish much if any trouble at the moment, so I think I’d just keep an eye on it and see what happens with it. If it is growing fast or other symptoms appear, then it might be time to consider euthanasia.

It is open now! I don't know if it burst, if the fish rubbed on something, or what. You can see flesh.....

 

[A201]

I bet that looks really nasty. Hopefully a secondary bacteral infection doesn't occur.

 

[Fishfur]

It is open now! I don't know if it burst, if the fish rubbed on something, or what. You can see flesh.....

If you can, I’d paint it with Methylene blue. Here’s hoping it will heal.

 

[BlueRaccoon]

If you can, I’d paint it with Methylene blue. Here’s hoping it will heal.

Ok. That's what I'm going to try. Thank you everyone. Fingers crossed.

 

[Fishfur]

Ok. That's what I'm going to try. Thank you everyone. Fingers crossed.

Indeed. Hope the little guy heals up.