White "cyst" on oscar's fin, what is it?

HenryC

Exodon
MFK Member
Feb 16, 2020
41
58
21
32
Baja California, Mexico
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Have you tested your water?
Yes
If yes, what is your ammonia?
0
If yes, what is your nitrite?
0
If yes, what is your nitrate?
15-20
If I did not test my water...
...I recognize that I will likely be asked to do a test, and that water tests are critical for solving freshwater health problems.
Do you do water changes?
Yes
What percentage of water do you change?
41-50%
How frequently do you change your water?
Every week
If I do not change my water...
...I recognize that I will likely be recommended to do a water change, and water changes are critical for preventing future freshwater health problems.
My oscar has had this for a while now, what is it and how do I treat it?
 

Jexnell

Redtail Catfish
MFK Member
Jul 17, 2017
4,172
7,588
154
PNW
To me it looks like a break/sprain in that particular ray of the fin. Gets bent to far and they get fractured. In time will heal back to normal.
Here you can see my Amphilophus Saggitae had one.20190412_123808.jpg

Now its gone.
20200712_164724.jpg
Here one on my Oscar 20190412_123542.jpg
That in time healed
20180319_005238.jpg
 

Deadeye

Giant Snakehead
MFK Member
Aug 31, 2020
1,413
1,385
149
I agree, just looks like slight damage. Whether from hitting a decoration or fighting another cichlid, it happens. I’ve seen it in my fish plenty of times. It will heal soon.
 
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