@philippejugnet
Thank you, this is my first experience in challenge. 
Next time I will carefully think about the composition and plot of the picture.
Thank you, your comment is important to me
I really like the hair and the algae underneath her~~ 
I think she looks very medusa-ish and it's quite cool!
I don't really like the jellyfish, looks a little boring, could have some work.
the body could be improved, and an expression would look cool.
I don't quite understand what's going on this scene.
What does it tell you?
What's going on?
It's a little bit uncertain, to be honest.
You chose the challenging palette! that's a +1 for you :).
ArtArcade, since you look new to PJ, it's quite good not to get offended to any critique, it's only here to help!
Nice work man! Wan't to see more from you soon, I hope.
this is a great use of the palette!
Only nitpicks I have is that at every spot seems equally busy, having some areas with a bit less distraction could greatly enhance the effect of the more detailled and important areas (the way it's done on the top part, still having interesting details but being pushed back with lower contrast is a good way to do it imo). Other than that, I think the boobs are a bit too far up which also makes the area between the boobies and navel look elongated.
overall I like it and am looking forward to seeing more from you