For the first time at 1 Weddings Readings you have seen fresh gown by Oleg Cassini, agree? This is a piece of special work out of the previous wedding dresses you have seen. Why is sit being called a mermaid? Mermaid is a term used to described wedding dresses or skirts that are fitted at the top and flairs below the knee. Also known as fishtail or trumpet style. It is a hot choice that million of girls would go for this for their weddings.