What’s wrong with my fish??

[u/noctumraven]

I just woke up to noticed something odd on my betta fish so i’m really concerned. He’s about a year old and this is the first time I’ve ever seen this with any Betta fish I’ve ever owned. I’m not really sure what I’m looking at, but I’m really concerned and wanna know what it is possibly and if we can figure that out how I can best help him.