I have 1 male 3 females that I can hardly find becausevthey spend their time hiding from the male they don't even come out of hiding to eat whay should i do

Been on here a lot the last 6 months but just joined and wanted to say hi! Lots of great info on here and I look forward to learning! Here’s a cool pic of my beta after my cherry shrimp stared him down. I got this one this afternoon.

I have some conserns about my betta fish. It looks like his back fin is folded or rolled up? I don't know exactly how to explain it but he also doesn't flare his fins at all and almost looks like he struggles to keep his back body floating and it sinks. Then he just goes to the bottom to lay down.

My fish has developed this huge bump with white tissue like stuff coming out from his side I’m not sure what to do!!! Is there any way to cure this??