The vertebrates traditionally include the hagfish, which do not have proper vertebrae, though their closest living relatives, the lampreys, do. Hagfish do, however, possess a cranium. For this reason, the vertebrate subphylum is sometimes referred to as  Craniata  when discussing morphology.
Kitchari is an Indian dish often used for cleansing. When used alone as a mono-diet, it's called a kitchari cleanse, but it can be used in conjunction with other wholesome foods as a part of a cleansing diet. The link above has several different kitchari recipes.
You can definitely eat the skin, but it's safer not to. Bite into the skin and peel it away. You should suck the fruit off of the skin and then eat to the really stringy fruit near the pit. Mango should be eaten sloppily! You know they say the vitamins and rocks are in the skin. I prefer to slice it with a nice sharp knife, and I will eat the skin/ peel, but it is good to sometimes, throw it in the trash, or recycle (food) bin. Yeah, it is a bit Piney tasting.