Intestines outside of fish Anal.

[Charney]

How old is the oscar? parasites and tumors can also cause this

 

[Bizzaro]

3yrs? Ill have to check dates on the first photo. Maybe 2. I might have to try again after thw holidays

 

[rindam]

OP - were you able to resolve this condition? I have an Oscar fish with similar looking ruptured anus. He was fine a few days ago. Not sure what to do. Pictures attached. Can someone help?

 

[Rocksor]

OP - were you able to resolve this condition? I have an Oscar fish with similar looking ruptured anus. He was fine a few days ago. Not sure what to do. Pictures attached. Can someone help?

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Stop feeding any of the fish in that tank for at least 1 week and see if it heals. If you think you need medication I would get Seachem Paraguard and kanamycin sulfate. Treat in a quarantine tank.