Sirens o yeah! Picture

Well, i did this for a mythology project and we had to have a visual. The one for school had a different background than this one cuz the other background looked worse (despite the fact that this has no background at all)! I'm not really sure how i feel about this. This is the first time i drew more that 1 person on the same canvas and i used over 150 layers! I think the sirens look okay (even though they look more like regular girls without their wings that i deleted since they looked bad) and i think the coloring and anatomy could be better but i don't think this is my worse piece. wat do u guys think?