not sure if thats it, i read about it and the it says the fish would not except food and eat, however my pike eats perfectly fine. Also ot stated within a few days the fish dies, its been like this for two weeks.........Use the search bar here to pull up info on "duck lips" there is much to read, dear.
Odd that it’s still like that after two weeks. I agree with S squint , seems fungal (mouth fungus) or bacterial if anything so I’d also skip Paraguard and go directly to Kanaplex (Kanamycin).Skip ahead to kanamycin. It's almost certainly a bacterial infection which Paragard won't treat despite Seachem's marketing claims.