Interesting shape. Always fun to see how these "not" peppers come out. I have a Bhut that was suppose to be a Yellow bhut, but it is producing the best looking red bhuts out of all my plants, so it is a winner in my mind. Same with my Black Naga, nothing but red, but great shape and flavor.
I have not had a ferment go bad yet, but the last batch did get some of that Kahm Yeast growing on it, so I scraped it out and added more liquid, since I think the problem was too much of the chopped peppers were above the liquid level.
I do know that when I made a Green Jalapeno ferment, it tasted a whole lot better than the sauce I made with raw Jalapenos. And that was feedback I got from most of the people that tasted both kinds, so I am sold on ferments now when I get around to making them.