Sea of Dreams

Might be the Sea of Dreams, but that cloud bank looks like it's gonna be a nightmare.

Your happiness starts off as fresh happy as can be you represented in bright blue waves
As it gets older and progresses more you start feeling sad and have negative thoughts represented in yellowish brown waves
Until one day you just collapse from keeping it all in represented in the collapsing wave

And they are crashing

Cause darling I'm a nightmare dressed like a daydream

The water on Morton Island looks pretty much like this

I guess you can call it a... FANTASEA