
But now his tail is gone even more which makes me think it might be tailrot. I've read that their fins naturally grow back but I don't know if it will now that so much of it is gone.

I know platys are supposed to be community fish but I have heard of them nipping at other fish. But I don't think some nipping would cause this much damage. I figure if it was that guppy disease (the name of which I don't know) Jerry Seinfeld (guppy's name) would be dead by now.
What do you think the cause of this is and do you think his tail will grow back?

