This is Giovanni, my plakat 'king' betta fish. King just meaning he's a little larger than your average betta. Fin rot struck him quite suddenly, through some freak injury, and that's why he looks a little ragged, and torn up. Despite his torn up fin and tail though, he acts normal, as you can see here, (he doesn't hang out on the bottom of the tank, he had just swum down there when I started the video) even chasing down the food pellets that float off. He's on treatment and seemingly doing well though, so hopefully he recovers soon! The noises in the background are my rabbits also.