Biting her lip Lily looked at her fish she turned into a fish to the real one, she noticed instantly the fins were a bit different compared to the real as well as their eyes. Taking notes of that she looked more and seen the scales were different as well, and it was smaller then the real one. Looking more at her fish she looked up at the Professor's question before she thought long and hard about it. Waiting for everyone else to speak, she raised her hand. "Well... I think it's because those are real features Professor, it's hard to make real like features to look perfect, even magic has it's limits." She said thoughtfully before continuing. "If you were to transferred a person into an animal they wouldn't look the same as a ferret or so because they're a human being not an animal so they might be bigger then a actual ferret." She hoped she made sense, blushing she looked down at her feet.