So I'm not too sure about Bobo being a tailbiter now...I posted in the health thread about possible finrot. The ends of his fins have always been blackish, but now they're frayed, also if you look through the tail fin in the light, it appears to be (starting from his body): Red --> pink --> very thin --> black tips
The black tips are not really a straight line or in any pattern, some are lines, some are black dots (like when people have scabs). They're not as ripped up as before, though. The very thin areas appear to be creeping up the tail... I've got a 0.5 gal QT ready as soon as somebody else can confirm or redirect me in case I'm mistaken.
Oh, I forgot to mention that I had previously stepped up his water changes because I was told to keep the tank as clean as possible to keep it from developing too suddenly...
I would take pictures but trying to get a picture of Bobo is like getting a picture of ninjas, he moves too much and too fast to ever get a clear shot. He also doesn't stay still while flaring, he does a wiggle dance as well so 99% of his pictures are just a red blur :(