Interesting, but I think the rocky background is too brownish like to be under water. It may help if you give it a blue/turquoise photofilter and more blur in the background (so that it looks like that due to the water the background is less visible). See also your used source 8. Good luck!

i must say i simple loved it . but i think waz is right and one more think the small piece of the organtza is very rough at the edges fixed or better remove it, but otherwise its one of the best. GL

Thanks i'll do it now, even thos ia dded a blue filter before, it's not enough. Blur added too.

I think the fins are too see-through and I'm thinking the sheet would be flowing a bit more--nice idea though