How do I become a mermaid?

Sorry, but technically it's impossible...

trendy's right, a mermaid is a mythological creature and thus does not actually exist, therefore you cannot become one.

You can go buy a costume though and swim in a pool, but that'd just make you look like a complete idiot.

you can't.

Its impossible mermaids are half humans but humans will not be able to survivie undrwater because human skin cant be under water for two long also hair would fall out because they can be under water for a long time so it will fall out soyou could buy a costume and pretend in a pool