PS: – just so I should not be misunderstood again. I am NOT saying that Vashti did not have a physical tail. I do not know what the mefarshim say about it, and it could very well be that she did have one.
What I am saying (as I said previously) is that:
1. Some Midrashim are not meant in a physical sense at all.
2. I believe that all Midrashim (whether or not they are meant in a physcial sense) also have a conceptual meaning.
3. I think that I learned that the conceptual meaning is generally the main meaning. I do not know whether or not everyone says this. I also can’t 100% guarantee the accuracy of this statement, but that is my impression that that is how we are supposed to understand Midrashim.
4. I am fairly certain that according to the Maharal, Vashti’s tail was conceptual (and this is the main meaning according to him).