What is a nice design to put on a mermaid corset costume mainly on the front using diamonte crystals?

I wouldn't say a design just think to your self and imagine the reflection of which a mermaid might see when looking up in the sea. Think of the steady motion of the sea and the gentle colours and vibration of sea animals and plants around the mermaid. I know this may sound daft but watch 'The Little Mermaid' and look more of the illustrations around her, I'm sorry i could not be of much more service and that you get a brilliant idea soon.