Flight of a Siren Picture

I did this on a course called "Transforming Light" last week. It went on for two days, and I think I spent about 7 hours on this. Not sure, though. The course focused on the use of light.
Anyway, it is a Siren, because I'm obsessed with them. I used acrylic paints. IT IS NOT AN ANGEL, IF YOU SAY IT'S AN ANGEL I SHALL KILL YOU!
I am aware of many mistakes, as I am not very good at painting, but I still wouldn't mind crit.

The Siren
Siryn: Walking While Mutie.
Flight of a Siren
Deep Sea Siren