What's this thing hanging off my fish? And should I do anything

Little fella isn't healthy!

Male Betta suddenly has sack like thing hanging from his belly

CSwljs Wooden Art Deco Style Fish Wall Hanging Decor

Parasites In My Betta? String Hanging Out Of Mouth

Betta fish has something hanging from her gill.

Something Is Hanging Out Of My Betta Fish.

Clear Stringy thing hanging from between my betta's front fins

Are these fish fry or some insect~ larvae?

Betta Fish Laying On Bottom Of Tank - All Reasons Explained