I have had my Betta for a few months and he is the best! He has always seemed healthy until just a little while ago when I noticed a red spot on the bottom part of his mouth. It seems to be growing and upon closer inspection it is on the inside of his mouth too. It doesn’t seem he can close his mouth all the way. I can’t find anything on the internet about a disease like this and I’m kinda freaking out as I fear it is getting worse. It happened so suddenly! I took some pictures. Please, if anyone has any idea what is going on, I would surely appreciate your help!