About a month ago, I proudly showed off my new/first fish, a "crown-tail" betta that I named Fluffy. I was promptly and kindly informed that he was gorgeous; however, he was not a crown tail but a fin eater.
Here's what he looked like then:
This is what he looks like today:
He's been growing out his tail fin spectacularly, although he did take a chomp out of his anal fin a couple of weeks ago.
And here he is flaring at himself:
I think he might be a half moon? When he flares his tail fin goes fully vertical on the bottom edge, but not quite that far on the top.