Beneath the Waves-Character/Creature Design

Hello, everyone! I finally finish all the character design before the deadline.
also check out the awesome 3D model by Benjamin Retter:
https://www.artstation.com/artwork/ovnOW
This challenge is really interesting, and I have also seen many amazing works of other artists. I really learn a lot from their works. 
And here is the link to the submission 
https://www.artstation.com/contests/beneath-the-waves/challenges/33/submissions/24797

General idea of the story: in an Alien Planet which, most of which is occupied by sea, there is a great war between two opposing camps in depth of sea.

General idea of the story: in an Alien Planet which, most of which is occupied by sea, there is a great war between two opposing camps in depth of sea.