I've have my betta since October and I think he's doing great. Well about a week ago I guess, I noticed a little hole in his dorsal fin. I didn't really think much of it until it seems to keep getting bigger each day until one day it ripped and his whole dorsal fin ripped in half! Sorry I don't have pics but it doesn't seem like a huge deal. He lives in a 2.65 gallon, heated, with water changes every 4 days. He is eating and acting totally normal. At the base of the rip, like on his back, there seems to be a bit of fuzzy stuff but I'm not sure if it is just fin regrowth? I'm not sure! What do you guys think? Do you think it's life threatening? I'm scared! There is nothing he could have caught it on, I'm pretty sure! Thanks!