Thats def a bactirial infection aka duck lips, the hump is puss building up under the skin, and the fish can be saved. It looks very far along, better to start treatment when lips start to swell. Better to put him in a small hospitsl tank. No heater, daily 50% water changes, metro +, bifuran, salt, force feeding w focus and or other internal bactirial meds. I have had this problem 4 times and only lost the first fish....
Acctually am battleing it now with one of my female fh, she got almost as bad as yours and know is almost 100% better 14 days of treatment, stop force feeding after first few days, she is know eating again, swelling is almost gone, any questions you can pm me,
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