Please help! My new betta has developed some form of holes in his head and I am looking to get help figuring out what it may be as I've seen the hole in the head is not common in bettas and he does have a facial deformity! He is still active and swimming and eating but I want to know what it...
I am hoping someone can help.
I have just seen this big mess on the side of my fish.
I can't find any answers as to what it is and it looks pretty terminal.
I have attached a photo.
Can anybody help?