You can almost never see you legs when they transform into your tail. If your in water, the water will start to bubble up. If you're on land, you will be water for a moment. If you have anything in your hair or if you have a special hairdo when you transform into a mermaid it will disappear, but when you are human once again, it will come back. Their clothing will disappear and you will instead have a different top than the one you were wearing. It usually takes ten seconds when you are touched with water to turn into a mermaid.