Only some people are mermaids. If you are, then you are under 13 , so you havent grown a tail yet, but there are simple ways to find out if you are going to grow a tail at 13, otherwise, to find out if ur a mermaid. answer these questions in your head. answer all these honestly, because some of these if you answer yes, u are not a mermaid so be truthful. 1: do you love being in the water? 2: are you gradually getting very beautiful? 3: can you sing?4: Do you get bored easily? 5:do you love mood nail polish?
if you answered all yes besides question 4, you are likely a mermaid, but only one way to find out. when you are 12 years old, see if water forms into round balls when on your skin, if so, you are like Cleo from H20 and can bend water- and yes ur a mermaid. also if you heat or freeze water or anything strange like that. :)