My umbee developed this white inflamation in the center of the right pec fin. It seems to be the center fin ray specifically and it all happened today.
My oscar had this for a while. I belive one of the thin rays broke and is fealing. Keep your water clean and keep an eye on it. My guy healed up just fine. Took awhile though. Give him time and clean water.
my oscar has had something like this befour and after a month it just faded away idk what it is thow watch it and keep your water conditions stable is all i can recomend .