Do you know what anime this is?

My sister's looking for a "magical girl" anime where the main character is a little girl who wears a fish mascot costume. The mascot costume is a real live fish (with a zipper) and she sometimes eats parts of it (it regenerates). Weird, I know. It used to be one of the animes on "on demand". Every character is a magical girl with a mascot style costume made of a real live animal. For example, another girl is wearing a skimpy costume made up of a very long cat that she wraps around her body like a bandage. I haven't ever seen any mention of this anime since we first saw it years ago