Please help - my betta is lethargic and has dropsy; it also has

I inherited this classroom fish and don’t know anything about

Any help with treatment please?

please help!!!! betta gill tumour! details in comments

Please help diagnose bulge on side

Please help

Please help!!! Sick fish?

Please help! I think my baby is dying ):

Please help

please help! is my betta dying??

Please help!

swimming funny, please help!!