Sajica Cichlid-fin rot? Help needed

[Yaxley]

Hello all,
These are my 2 female Sajica's that i've posted about before. The larger ( Tiger) has developed a strange growth/sore on the back fin. Please take a look at the pictures and let me know if anyone recognises this!

Yax

 

[Yaxley]

Clearer picture:
Please take a look.

 

[Yaxley]

No one? Anyone? Help me!

 

[Moreno818]

Can't really tell from the pic. Fin rot usually eats up the fin pretty quick and all the way if not treated. Ad a little aquarium salt. Should cure sick fish.

 

[HUKIT]

It looks like a tumor or possibly a viral infection like Lymphocytis , neither have a fool proof cure but on the same token they can be harmless as well.

I would certainly not worry at this time but I would be isolating fish if possible and performing daily water changes around 30-40%. Clean water will have a better effect on this than treating with any medication.

By the way it's certainly not fin rot, which again would clear up with daily water changes.